For a Ring Video Doorbell 2, the best transformer depends on your existing wiring and the doorbell’s power requirements—not simply on choosing the highest voltage. My best overall pick is the Newhouse Hardware 16V 30VA Doorbell Transformer, a purpose-matched option for compatible Ring doorbells; the Ring Plug-In Adapter (2nd Generation) is a simpler alternative when a nearby outlet can supply power, while the Newhouse 3040TR Dual-Voltage Transformer offers more flexibility when you need a choice of output. The main tradeoffs are installation effort, cable routing, voltage and VA compatibility, and whether you need a hardwired or plug-in setup. Check your Ring Doorbell 2’s required input and your existing transformer before buying, since the listed 24V models are not automatically suitable just because they appear in this roundup. Read on for the full comparison, selection criteria, and setup guidance.
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Key Takeaways
- The Newhouse 16V 30VA model is the most directly targeted wired pick in this lineup; verify its output against your Ring Doorbell 2 documentation and existing wiring before installation.
- Several 24V 40VA options share similar electrical ratings, so cable length, terminal design, and whether the model is intended for doorbell or thermostat use matter more than the headline rating alone.
- Plug-in adapters solve a different problem from wired transformers: the Ring adapter and cable-equipped alternatives can avoid replacing a transformer, but need a suitable outlet and a workable cable route.
- Dual-voltage models offer flexibility rather than automatic compatibility; select the correct output setting and confirm the Ring Doorbell 2’s specifications before connecting.
- Tri-volt 8V/10VA, 16V/10VA, or 24V/20VA output is a distinct low-capacity option, not a drop-in substitute for every 16V 30VA or 24V 40VA transformer.
| GIVEUBED 24V 40VA Doorbell and Thermostat Transformer |  | Best Overall for Hardwired Upgrades | Brand: GIVEUBED | Model: 24V40VA | Input: 120V AC, 60Hz | VIEW ON AMAZON | See Our Full Breakdown |
| Newhouse Hardware 24V 40VA Doorbell Transformer, Model 40TR |  | Best for Junction-Box Installation | Brand: Newhouse Hardware | Model: 40TR | Output: 24V, 40VA | VIEW ON AMAZON | See Our Full Breakdown |
| Newhouse Hardware 16V 30VA Doorbell Transformer, Compatible with Ring Video Doorbells |  | Best for Existing 16V Doorbell Systems | Brand: Newhouse Hardware | Model: 30TR | Voltage: 16V | VIEW ON AMAZON | See Our Full Breakdown |
| ChooKaChoo 24V Doorbell Transformer Adapter with 16.4 ft Cable |  | Best for Flexible Indoor Cable Routing | Brand: ChooKaChoo | Model: 001 | Input: 120V AC, 60Hz | VIEW ON AMAZON | See Our Full Breakdown |
| RAGNAROS 24V AC Doorbell Transformer with 18-Foot C-Wire Adapter |  | Best for Long Outlet-to-Doorbell Runs | Brand: RAGNAROS | Model: AC24V-CWIRE | Input: 120V AC, 60Hz | VIEW ON AMAZON | See Our Full Breakdown |
| Auspow 24V 40VA Doorbell Transformer |  | Best for Straightforward Surface Mounting | Brand: Auspow | Model: 24v 40va-3 | Input: 120 V, 50/60 Hz | VIEW ON AMAZON | See Our Full Breakdown |
| EPLZON 24V 40VA Thermostat and Doorbell Transformer |  | Best for Buyers Prioritizing UL Certification | Brand: EPLZON | Model: EP-4011 | Input: 120 VAC, 60 Hz | VIEW ON AMAZON | See Our Full Breakdown |
| Hardwired Transformer for Ring Wired Video Doorbells |  | Best Ring-Specific 16V Option | Manufacturer: Ring | Model number: 8EAGS7-0EN0 | Input: 120V AC, 60 Hz | VIEW ON AMAZON | See Our Full Breakdown |
| VIIVRIA 24V 40VA Doorbell Transformer for Ring and Nest |  | Best for Multi-Brand Smart-Home Setups | Brand: VIIVRIA | Model: 130023-UD-CA | Input: 120 VAC, 60 Hz | VIEW ON AMAZON | See Our Full Breakdown |
| Newhouse Hardware 3040TR Dual-Voltage Wired Doorbell Transformer |  | Best for Installations That May Need Two Voltage Options | Brand: Newhouse Hardware | Model: 3040TR | Output options: 16V/30VA or 24V/40VA | VIEW ON AMAZON | See Our Full Breakdown |
| TytonClaw Dual-Volt Wired Doorbell Transformer (16V/30VA or 24V/40VA) |  | Best for Flexible Hardwired Upgrades | Brand: TytonClaw | Model: TC2012 | Output options: 16V AC / 30VA or 24V AC / 40VA, selectable | VIEW ON AMAZON | See Our Full Breakdown |
| VIIVRIA 24V AC Transformer with 315-Inch Cable for Ring Doorbells and Thermostats |  | Best for Long-Reach Outlet Placement | Brand: VIIVRIA | Output: 24V AC, 500mA | Cable length: 315 inches (8 meters) | VIEW ON AMAZON | See Our Full Breakdown |
| Ring Plug-In Adapter (2nd Generation) for Doorbells |  | Best for Ring-Specific Plug-In Power | Power input: 100–240V AC, 50/60Hz, 0.5A | Power output: 24V DC, 0.5A, 12W | Cable length: 10 ft | VIEW ON AMAZON | See Our Full Breakdown |
| Newhouse Hardware 3TRAN Tri-Volt (8VAC/10VA, 16VAC/10VA or 24VAC/20VA) Transformer for Ring, Nest and Standard Doorbells 1pk |  | Best for Multiple Low-Voltage Options | Input voltage: 120V AC | Output options: 8V AC / 10VA, 16V AC / 10VA, or 24V AC / 20VA | UL certified: Yes | VIEW ON AMAZON | See Our Full Breakdown |
| transformer for ring doorbell 2 | Brand | Model | Output | Input |
|---|---|---|---|---|
| GIVEUBED 24V 40VA Doorbell and | GIVEUBED | 24V40VA | — | 120V AC, 60Hz |
| Newhouse Hardware 24V 40VA Doo | Newhouse Hardware | 40TR | 24V, 40VA | — |
| Newhouse Hardware 16V 30VA Doo | Newhouse Hardware | 30TR | — | — |
| ChooKaChoo 24V Doorbell Transf | ChooKaChoo | 001 | 24V AC, 500mA | 120V AC, 60Hz |
| RAGNAROS 24V AC Doorbell Trans | RAGNAROS | AC24V-CWIRE | 24V AC, 500mA (12W) | 120V AC, 60Hz |
| Auspow 24V 40VA Doorbell Trans | Auspow | 24v 40va-3 | 24 V AC, 40 VA | 120 V, 50/60 Hz |
| EPLZON 24V 40VA Thermostat and | EPLZON | EP-4011 | 24 V, 40 VA | 120 VAC, 60 Hz |
| Hardwired Transformer for Ring | — | — | 16V, 30VA | 120V AC, 60 Hz |
| VIIVRIA 24V 40VA Doorbell Tran | VIIVRIA | 130023-UD-CA | 24V AC, 40VA | 120 VAC, 60 Hz |
| Newhouse Hardware 3040TR Dual- | Newhouse Hardware | 3040TR | — | — |
| TytonClaw Dual-Volt Wired Door | TytonClaw | TC2012 | — | — |
| VIIVRIA 24V AC Transformer wit | VIIVRIA | — | 24V AC, 500mA | — |
| Ring Plug-In Adapter | — | — | — | — |
| Newhouse Hardware 3TRAN Tri-Vo | — | — | — | — |
More Details on Our Top Picks
GIVEUBED 24V 40VA Doorbell and Thermostat Transformer
For a Ring Doorbell 2 installation that already has a suitable electrical box and wiring, I’d start with the GIVEUBED 24V 40VA. Its 24V AC output and 40VA capacity make it a stronger fit for powering a compatible doorbell alongside another supported device than the Newhouse Hardware 16V 30VA, which is aimed at lower-voltage setups. The plate-mount design is intended for electrical-box installation, keeping this pick focused on a permanent wired replacement rather than a plug-in workaround. That capacity and flexibility come with a tradeoff: installation requires electrical-box access and appropriate wiring, so it is not the easiest choice for a renter or someone avoiding electrical work. I’d also check the Ring Doorbell 2’s power requirements and local supply conditions before selecting a 24V transformer.
Pros:- 24V AC, 40VA output supports compatible smart doorbells and additional devices within its rated capacity.
- Works with many compatible Ring, Ecobee, Nest, and Sensi models.
- Plate-mount design is suited to electrical-box installation.
Cons:- Requires electrical-box access and a hardwired installation.
- The 24V output may vary with regional electrical conditions, so buyers should verify device compatibility.
Best for: Homeowners replacing an existing doorbell transformer who have an electrical box and want 24V capacity for compatible doorbell and thermostat equipment.
Not ideal for: Renters or buyers without an accessible electrical box who need a plug-in adapter and simple cable routing.
- Brand:GIVEUBED
- Model:24V40VA
- Input:120V AC, 60Hz
- Load output:24V AC ±5%, 40VA
- No-load output:27V AC ±5%
- Mounting type:Plate mount
- Dimensions:1.3 × 1.9 × 2.6 in
- Weight:700 g
Our verdict“Choose this for a permanent, higher-capacity 24V replacement when you already have suitable electrical-box wiring.”
Newhouse Hardware 24V 40VA Doorbell Transformer, Model 40TR
The Newhouse Hardware 40TR is a practical choice when the replacement needs to mount directly to a junction box: its threaded hub gives it a more specific mounting solution than the plate-mounted GIVEUBED 24V 40VA. It supplies 24V at 40VA for compatible wired video doorbells, smart thermostats, or mechanical chimes, giving buyers room to support more than one compatible load within the unit’s rating. The UL listing and two-year manufacturer-defect warranty also provide concrete product documentation that the ChooKaChoo corded adapter does not share in the same hardwired format. The main limitation is placement. Newhouse specifies installation outside a wall with space for heat dissipation, so it is a poor match for a concealed, cramped location or anyone who wants outlet-powered installation instead.
Pros:- Threaded hub is designed for junction-box mounting.
- 24V, 40VA output supports compatible video doorbells, thermostats, and mechanical chimes.
- UL listed and covered by a two-year manufacturer-defect warranty.
- Color-coded leads support connection identification during installation.
Cons:- Must be mounted outside a wall with room for heat dissipation.
- Hardwired junction-box installation is less suitable for renters or buyers seeking a simple outlet adapter.
Best for: Homeowners replacing a transformer at an accessible junction box who want a 24V hardwired unit with a threaded mounting hub.
Not ideal for: Buyers who need to conceal the transformer inside a wall, lack junction-box access, or prefer a plug-in setup.
- Brand:Newhouse Hardware
- Model:40TR
- Output:24V, 40VA
- Mounting:Threaded hub for junction-box mounting
- Compatible devices:Video doorbells, smart thermostats, and 24V mechanical chimes
- Safety listing:UL listed
- Warranty:2 years against manufacturer defects
Our verdict“Pick the 40TR when you have an accessible junction box and want a documented 24V hardwired replacement.”
Newhouse Hardware 16V 30VA Doorbell Transformer, Compatible with Ring Video Doorbells
If your existing Ring Doorbell 2 wiring calls for a 16V transformer, the Newhouse Hardware 30TR is the voltage-matched option in this group. It supplies 16V at 30VA and is described for Ring video doorbells and wired chimes, while the GIVEUBED and Newhouse 40TR models provide 24V instead. That distinction matters more than simply choosing the largest VA figure: I’d match the transformer to the doorbell and chime requirements rather than assume a higher voltage is automatically better. The threaded hub supports standard junction-box mounting, and the unit is UL certified with heat-resistant construction. Its biggest tradeoff is installation location: it needs ventilation and must not be placed inside a wall. Buyers seeking 24V output or a plug-in adapter should choose another type.
Pros:- 16V, 30VA output suits compatible Ring doorbells and wired chimes.
- Threaded hub is designed for standard junction-box mounting.
- UL certified and built with heat-resistant construction.
- Includes a two-year manufacturer-defect warranty.
Cons:- Must be installed outside a wall with adequate ventilation.
- Lower voltage and capacity than the 24V, 40VA hardwired options in this roundup.
Best for: Ring Doorbell 2 owners replacing an existing 16V transformer and retaining a compatible wired chime and junction-box arrangement.
Not ideal for: Buyers whose doorbell setup specifies 24V, or anyone needing a concealed in-wall or outlet-powered transformer.
- Brand:Newhouse Hardware
- Model:30TR
- Voltage:16V
- Capacity:30VA
- Mounting:Threaded hub for standard junction box
- Certification:UL certified
- Warranty:2 years against manufacturer defects
- Included components:16V 30VA transformer
Our verdict“Choose this when your compatible Ring Doorbell 2 setup specifically calls for a 16V hardwired transformer.”
ChooKaChoo 24V Doorbell Transformer Adapter with 16.4 ft Cable
The ChooKaChoo adapter is aimed at Ring Doorbell 2 owners who want continuous power without replacing a hardwired transformer. Its 16.4-foot cable gives more placement flexibility than the hardwired GIVEUBED or Newhouse 40TR, while the included clips help keep the run along an indoor route. The tradeoff is lower available output: at 24V AC and 500mA, it supplies 12W, rather than the 40VA capacity offered by those junction-box models. That makes checking the exact doorbell and chime requirements especially important before buying. It also needs an indoor outlet and a visible cable path to the doorbell, so it will not suit a clean, concealed installation. Its listed FCC and UL certifications add useful product information for an adapter-style option.
Pros:- 16.4-foot cable allows flexible placement between an indoor outlet and doorbell.
- Includes 10 clips for securing the cable route.
- Provides continuous power without relying on existing doorbell wiring.
- FCC and UL certifications are listed.
Cons:- Requires an indoor outlet and a routed cable that may remain visible.
- 500mA output is lower than the 40VA capacity of the hardwired 24V models.
- Compatibility depends on the specific doorbell model.
Best for: Ring Doorbell 2 owners without usable existing doorbell wiring who can route a cable from an indoor outlet to the device.
Not ideal for: Buyers who want concealed wiring, need a hardwired junction-box transformer, or have a device setup that requires more output than 24V AC at 500mA.
- Brand:ChooKaChoo
- Model:001
- Input:120V AC, 60Hz
- Output:24V AC, 500mA
- Cable length:16.4 ft (5 m)
- Mounting type:Wall mount
- Safety certification:FCC, UL
- Included components:Adapter, 10 cable clips
Our verdict“Choose this adapter if you need outlet-powered continuous supply and can route its 16.4-foot cable neatly indoors.”
RAGNAROS 24V AC Doorbell Transformer with 18-Foot C-Wire Adapter
For buyers who need a little more reach than the ChooKaChoo adapter provides, the RAGNAROS 18-foot cable offers an extra 1.6 feet and includes 12 mounting clips. Like the ChooKaChoo, it powers compatible equipment from a standard outlet, avoiding a hardwired transformer replacement; unlike the GIVEUBED 24V 40VA, it is limited to 24V AC at 500mA (12W). That makes it a convenience-focused option, not a substitute for a higher-capacity transformer when a setup requires one. The listed fire-resistant casing and thermal protection are useful design features, but the adapter still needs an indoor outlet and a cable route to the doorbell. I’d verify compatibility with the exact Ring Doorbell 2 configuration before choosing it, particularly if a chime is part of the circuit.
Pros:- 18-foot cable offers more reach than the ChooKaChoo 16.4-foot adapter.
- Includes 12 mounting clips for cable routing.
- Provides continuous power without existing doorbell wiring.
- Features a fire-resistant casing and thermal protection.
Cons:- Requires access to an indoor outlet and a cable route to the doorbell.
- Output is limited to 24V AC at 500mA (12W), below the hardwired 40VA options.
- Compatibility depends on the specific doorbell and connected equipment.
Best for: Ring Doorbell 2 owners without existing doorbell wiring who need an outlet-powered adapter with extra cable reach and included routing clips.
Not ideal for: Buyers who need 40VA capacity, concealed hardwired installation, or an adapter that does not depend on an indoor outlet.
- Brand:RAGNAROS
- Model:AC24V-CWIRE
- Input:120V AC, 60Hz
- Output:24V AC, 500mA (12W)
- Cable length:18 ft
- Dimensions:2 × 2.5 × 3 in
- Weight:8 oz
- Included components:AC transformer, 12 mounting clips
Our verdict“Choose RAGNAROS over the shorter ChooKaChoo when outlet power works for your setup and the extra cable reach helps with routing.”
Auspow 24V 40VA Doorbell Transformer
The Auspow 24V 40VA is a practical choice when the existing transformer is accessible and a surface-mounted replacement suits the installation. Its 24V AC, 40VA output is intended for compatible wired doorbells, chimes, and smart thermostats, giving Ring Doorbell 2 owners a higher-capacity option than a basic low-output doorbell unit. Compared with the EPLZON 24V 40VA, Auspow specifies a lighter, compact body and surface mounting, while EPLZON adds a stated UL certification and wall-mount format. Auspow’s tradeoff is that its listing does not specify a safety certification, and it still requires hardwired installation rather than offering a plug-in setup. Check the Ring Doorbell 2’s power requirements and your chime configuration before choosing it; 24V and 40VA alone do not settle compatibility.
Pros:- 24V AC, 40VA output for compatible wired doorbells and chimes
- Surface-mount design suits installations where the transformer remains accessible
- Compact listed dimensions of 1.3 x 1.9 x 2.6 inches
- Can also serve compatible smart thermostats
Cons:- Requires a hardwired 120V connection and suitable installation skills
- Product data does not specify a UL certification
- Compatibility depends on the Ring Doorbell 2 and chime power requirements
Best for: Ring Doorbell 2 owners replacing an accessible transformer who specifically need a compact, surface-mount 24V AC, 40VA unit.
Not ideal for: Renters or buyers seeking a plug-in power supply, and anyone who needs a clearly stated UL certification or is unsure how to work safely with hardwired mains electricity.
- Brand:Auspow
- Model:24v 40va-3
- Input:120 V, 50/60 Hz
- Output:24 V AC, 40 VA
- Mounting type:Surface mount
- Power source:Corded electric
- Dimensions:1.3 x 1.9 x 2.6 in
- Compliance:RoHS
Our verdict“Choose Auspow if you need a compact surface-mounted 24V, 40VA replacement and can verify that its output suits your Ring Doorbell 2 setup.”
EPLZON 24V 40VA Thermostat and Doorbell Transformer
For a buyer who wants a stated safety certification alongside a common smart-device output, the EPLZON EP-4011 has a clear point of difference: it is listed as UL-certified and supplies 24V, 40VA. The product description names Ring among its supported brands, though I would still check the Ring Doorbell 2’s power and chime requirements rather than treating brand compatibility as a guarantee for every setup. Compared with the Auspow 24V 40VA, EPLZON offers the certification detail and wall-mount format; Auspow is lighter and explicitly described for surface mounting. EPLZON’s listed weight is 0.76 kg, and its 120V AC input means this is a hardwired replacement, not an easy plug-in alternative. Its output is also not a match for devices that call for a different voltage.
Pros:- UL-certified according to the supplied product information
- 24V, 40VA output for compatible doorbells and thermostats
- Ring and several smart thermostat brands are named in the compatibility information
- Supports screw-down and thread-clamp installation
Cons:- Requires a 120V AC hardwired connection
- Its 0.76 kg listed weight may make it less appealing where a lighter transformer is preferred
- Compatibility still depends on the specific device and chime requirements
Best for: Homeowners replacing a wired transformer who want a 24V, 40VA option with stated UL certification and compatibility information that includes Ring.
Not ideal for: Buyers who need plug-in power, a 16V transformer, or a small, lightweight unit for a constrained mounting location.
- Brand:EPLZON
- Model:EP-4011
- Input:120 VAC, 60 Hz
- Output:24 V, 40 VA
- Mounting type:Wall mount
- Installation connections:Screw-down and thread clamps
- Certification:UL
- Weight:0.76 kg
Our verdict“Pick EPLZON if UL certification and a stated 24V, 40VA output matter more to you than a lighter surface-mount design.”
Hardwired Transformer for Ring Wired Video Doorbells
This Ring 16V 30VA transformer is the lineup’s focused choice for buyers whose installation calls for 16V rather than the 24V output offered by the Auspow and VIIVRIA models. It is made for Ring wired video doorbells, including the Video Doorbell Wired, Pro, and Pro 2, and includes installation tools. That Ring-specific positioning makes it easier to narrow down than a general-purpose transformer, but the listed compatibility does not name the Ring Doorbell 2. Verify the Doorbell 2’s requirements before buying; a product’s fit with other Ring models does not confirm fit for this one. It also offers less output capacity than the 24V, 40VA alternatives and is limited to North American 120V standards. I’d favor it only when its voltage and model compatibility are confirmed.
Pros:- 16V, 30VA output for installations that specifically call for those ratings
- Designed for several named Ring wired video doorbell models
- Installation tools are included
- Dimensions are listed for checking fit in a standard transformer space
Cons:- Supplied compatibility details do not name Ring Doorbell 2
- Limited to Ring devices according to the product information
- 16V, 30VA output differs from the 24V, 40VA options in this roundup
Best for: Ring owners with a compatible listed wired video doorbell who need a 16V, 30VA hardwired transformer and value included installation tools.
Not ideal for: Ring Doorbell 2 owners who have not confirmed model-specific compatibility, or buyers whose transformer requirements call for 24V, 40VA.
- Manufacturer:Ring
- Model number:8EAGS7-0EN0
- Input:120V AC, 60 Hz
- Output:16V, 30VA
- Listed compatible models:Video Doorbell Wired, Pro, and Pro 2
- Dimensions:2.34 x 2.55 x 1.92 inches
- Weight:1.57 pounds
- Installation:Hardwired; tools included
Our verdict“Choose this Ring-specific transformer only if your exact doorbell model is confirmed compatible and its 16V, 30VA output matches your installation.”
VIIVRIA 24V 40VA Doorbell Transformer for Ring and Nest
The VIIVRIA 24V 40VA makes sense when a home’s doorbell and thermostat ecosystem spans multiple brands: its compatibility list names Ring, Nest, Wyze, Eufy, Ecobee, Honeywell, and Sensi. For Ring Doorbell 2 shoppers, that broad list is useful context, but it does not replace checking the device’s exact power requirements or the wiring and chime arrangement. Compared with the Ring 16V 30VA transformer, VIIVRIA is less model-specific but offers a higher 24V, 40VA output and supports wired chimes. Its copper-core construction is another stated design detail, though the product data gives no performance measurements tied to it. The main compromise is installation: this is a hardwired transformer with screw-down or threaded-clamp connections, not a plug-in solution.
Pros:- Compatibility information names Ring and several other smart-device brands
- 24V AC, 40VA output for compatible devices
- Copper-core construction is specified
- Screw-down or threaded-clamp connections support electrical box installation
Cons:- Requires hardwired electrical installation
- The broad brand list does not confirm compatibility with every model or chime configuration
- Product details provide no dimensions or certification information
Best for: Homeowners who want one hardwired 24V, 40VA transformer for compatible smart doorbells, wired chimes, and thermostats from different brands.
Not ideal for: Renters, buyers seeking a plug-in adapter, or anyone whose Ring Doorbell 2 setup requires an output other than 24V AC, 40VA.
- Brand:VIIVRIA
- Model:130023-UD-CA
- Input:120 VAC, 60 Hz
- Output:24V AC, 40VA
- Core:Copper
- Compatibility:Ring, Nest, Wyze, Eufy, Ecobee, Honeywell, and Sensi devices
- Installation:Hardwired; screw-down or threaded-clamp connections
- Included components:24V 40VA doorbell transformer
Our verdict“Choose VIIVRIA if you need a hardwired 24V, 40VA supply for a mixed-brand smart-home setup and have verified Ring Doorbell 2 compatibility.”
Newhouse Hardware 3040TR Dual-Voltage Wired Doorbell Transformer
The Newhouse Hardware 3040TR stands apart from the fixed-output Auspow and VIIVRIA models by offering a choice of 16V/30VA or 24V/40VA. That flexibility can help when replacing an older transformer or matching different compatible video doorbells, but only one output can be used at a time. For a Ring Doorbell 2 installation, I’d confirm which setting its wiring and chime require before purchase; the listing names Ring among its compatible brands but does not specify Doorbell 2 individually. Its threaded hub is intended for junction-box mounting, unlike Auspow’s surface-mount design. The installation has stricter placement needs: this indoor unit requires ventilation and must not be installed inside a wall. It suits a planned, accessible installation better than a tight or enclosed space.
Pros:- Offers a choice of 16V/30VA or 24V/40VA output
- Compatibility information names Ring and several other video doorbell brands
- Threaded hub mount is designed for junction-box installation
- UL Listed Class 2 according to the supplied product description
Cons:- Only one voltage output can be used at a time
- Requires space and ventilation and must not be installed inside a wall
- Ring Doorbell 2 compatibility and the correct voltage should be confirmed for the specific setup
Best for: Homeowners replacing a wired transformer who need to choose between 16V/30VA and 24V/40VA for compatible video doorbell equipment.
Not ideal for: Buyers who need both voltage outputs at once, have no ventilated indoor mounting location, or want a plug-in or enclosed-wall installation.
- Brand:Newhouse Hardware
- Model:3040TR
- Output options:16V/30VA or 24V/40VA
- Output use:One voltage option at a time
- Mounting:Threaded hub mount
- Installation:Indoor; requires ventilation and must not be installed inside a wall
- Compatibility:Ring, Nest, Wyze, Eufy, Arlo, and other video doorbells
- Class:UL Listed Class 2
Our verdict“Pick the 3040TR if you need a choice of output ratings and can provide an accessible, ventilated indoor mounting location.”
TytonClaw Dual-Volt Wired Doorbell Transformer (16V/30VA or 24V/40VA)
The TytonClaw TC2012 is the most adaptable hardwired pick here for a Ring Doorbell 2 setup: choose 16V/30VA or 24V/40VA to match the device and installation rather than being locked into one output. Its higher-capacity 24V setting may suit a system struggling with power interruptions, while the 16V setting gives more flexibility for compatible doorbell circuits. Compared with the Newhouse Hardware 3TRAN Tri-Volt, TytonClaw offers higher stated capacity at its 24V setting, though Newhouse adds an 8V option and UL certification. The tradeoff is that this is an indoor hardwired AC unit, not a plug-in fix: installation involves mains wiring, and only one output setting can be used at a time. Choose it when you want selectable capacity and can install it safely.
Pros:- Selectable 16V/30VA and 24V/40VA outputs accommodate different compatible wired setups.
- 40VA maximum capacity is a stronger option for addressing power-related doorbell issues.
- Heat-resistant housing is specified for long-term indoor operation.
- Compatible with Ring and several other smart-home brands, plus wired chimes and thermostats.
Cons:- Only one voltage output can be selected and used at a time.
- Indoor hardwired installation may require professional help for safe mains wiring.
- AC output will not suit devices that require DC power.
Best for: Ring Doorbell 2 owners replacing an underpowered wired transformer who need a choice between 16V and higher-capacity 24V output.
Not ideal for: Renters or buyers who want a simple outlet-powered installation, or anyone whose device requires DC power.
- Brand:TytonClaw
- Model:TC2012
- Output options:16V AC / 30VA or 24V AC / 40VA, selectable
- Current type:AC
- Mounting type:Wall mount
- Installation:Indoor hardwired
- Compatibility:Ring, Nest, Eufy, Wyze, Arlo, wired chimes, and smart thermostats
Our verdict“Choose the TytonClaw if your Ring Doorbell 2 needs a hardwired upgrade and you want selectable voltage with up to 40VA capacity.”
VIIVRIA 24V AC Transformer with 315-Inch Cable for Ring Doorbells and Thermostats
For a Ring Doorbell 2 installation where the outlet is far from the door, the VIIVRIA’s 315-inch cable is its defining advantage. It supplies 24V AC at 500mA without requiring a hardwired transformer swap, and the long lead gives more freedom to route power around a room or hallway. Compared with the Ring Plug-In Adapter (2nd Generation), VIIVRIA is an AC adapter compatible with a range of thermostat brands as well as Ring; Ring’s adapter is a brand-specific DC solution with clearly listed compatibility for the Doorbell 2. That difference makes checking your exact device’s power requirements especially important. VIIVRIA also needs an indoor outlet, and its cable may remain visible along the wall. It suits buyers who value reach and flexible placement over a tidy concealed installation.
Pros:- 315-inch cable allows flexible placement when the outlet is not close to the door.
- Provides continuous 24V AC power from a standard indoor outlet.
- Compatible with Ring doorbells and several named thermostat brands.
- Corded setup avoids replacing an existing hardwired transformer.
Cons:- Requires access to an indoor wall outlet.
- The long cable can be visible and may need careful routing.
- The fixed 24V AC output offers less flexibility than the TytonClaw’s selectable voltage settings.
Best for: Ring Doorbell 2 owners with a suitable outlet several feet from the door who want a long cable and do not want to replace a hardwired transformer.
Not ideal for: Buyers who need a concealed, hardwired installation, have no nearby indoor outlet, or have not verified that their device accepts this 24V AC supply.
- Brand:VIIVRIA
- Output:24V AC, 500mA
- Cable length:315 inches (8 meters)
- Mounting type:Wall mount
- Power source:Corded electric
- Dimensions:2.17 x 3.94 x 3.15 inches (D x W x H)
- Compatible devices:Ring doorbells; Nest, Ecobee, Honeywell, and Sensi thermostats
Our verdict“Pick VIIVRIA when a long cable and outlet-powered setup matter more than concealed wiring or selectable output.”
Ring Plug-In Adapter (2nd Generation) for Doorbells
The Ring Plug-In Adapter (2nd Generation) is the most direct choice for a Ring Doorbell 2 owner who wants to avoid hardwired transformer work. Its 10-foot cable connects to an indoor outlet, while the 24V DC output keeps the compatible doorbell’s rechargeable battery charged. Compared with the VIIVRIA 24V AC Transformer, Ring’s adapter uses DC and lists specific Ring models, including Doorbell 2, rather than emphasizing cross-brand thermostat compatibility. That clear device match is useful, but the cord is shorter and the setup still depends on a conveniently placed indoor outlet. It also does not work with Peephole Cam or Video Doorbell Elite. Pick this over a hardwired unit when ease of installation and Ring-specific compatibility matter more than a permanent, concealed power connection.
Pros:- Listed as compatible with Ring Video Doorbell 2 and multiple other Ring models.
- Keeps the compatible doorbell’s rechargeable battery charged.
- 10-foot cable and included clips support straightforward cable routing.
- Built-in short-circuit protection is specified.
Cons:- Requires an indoor outlet and leaves a cable to route from the outlet to the doorbell.
- Not compatible with Peephole Cam or Video Doorbell Elite.
- Its 24V DC output is a different approach from AC hardwired transformers such as the TytonClaw.
Best for: Ring Doorbell 2 owners who want a model-listed, outlet-powered option that keeps the rechargeable battery charged without replacing household wiring.
Not ideal for: Buyers without an indoor outlet near the door, those seeking concealed hardwiring, or owners of Peephole Cam or Video Doorbell Elite.
- Power input:100–240V AC, 50/60Hz, 0.5A
- Power output:24V DC, 0.5A, 12W
- Cable length:10 ft
- Outlet type:Standard indoor power outlet
- Dimensions:2.8 x 2.2 x 1.5 inches (7 x 5.5 x 3.7 cm)
- Compatible devices:Video Doorbell Wired; Video Doorbell 1st and 2nd Generation (2020 Release); Doorbell 2, 3, 3 Plus, and 4; Battery Doorbell and Battery Doorbell Plus; Video Doorbell Pro and Pro 2
- Incompatible devices:Peephole Cam and Video Doorbell Elite
- Protection:Built-in short-circuit protection
Our verdict“Choose Ring’s adapter if your Doorbell 2 is compatible and you prefer a direct outlet-powered setup over hardwired installation.”
Newhouse Hardware 3TRAN Tri-Volt (8VAC/10VA, 16VAC/10VA or 24VAC/20VA) Transformer for Ring, Nest and Standard Doorbells 1pk
The Newhouse Hardware 3TRAN Tri-Volt gives buyers three fixed AC choices—8V, 16V, or 24V—making it useful when a home’s doorbell circuit or connected chime calls for a particular voltage. Its UL certification and two-year warranty also distinguish it from the TytonClaw, which offers fewer voltage choices but substantially higher stated capacity at 24V: 20VA here versus 40VA there. For a Ring Doorbell 2, that capacity difference matters if the main concern is a power-hungry setup or persistent low-power symptoms. Newhouse is better matched to buyers who need a specific lower-voltage option or want a surface-mount replacement for a traditional doorbell system. The unit must remain outside a wall for heat dissipation, and its fixed settings leave no adjustment between the listed outputs.
Pros:- Three selectable AC output settings cover traditional and compatible smart-doorbell circuits.
- UL certification is specified.
- Includes a two-year warranty.
- Surface-mount design supports installation outside a wall where heat can dissipate.
Cons:- The 24V setting is rated at 20VA, below the TytonClaw’s 40VA maximum.
- Must be mounted outside walls to allow heat dissipation.
- Only the three listed fixed voltage settings are available.
Best for: Homeowners replacing a traditional doorbell transformer who need an 8V, 16V, or 24V AC option and can mount the unit in a ventilated surface location.
Not ideal for: Ring Doorbell 2 owners whose priority is maximum transformer capacity, or anyone who needs the transformer concealed inside a wall.
- Input voltage:120V AC
- Output options:8V AC / 10VA, 16V AC / 10VA, or 24V AC / 20VA
- UL certified:Yes
- Mounting type:Surface mount
- Power source:Corded electric
- Dimensions:2.63 x 2.56 x 2.25 inches (D x W x H)
- Warranty:2 years
Our verdict“Choose the 3TRAN when you need its three voltage choices and surface mounting, but choose a higher-capacity model if your Ring Doorbell 2 needs more power headroom.”
How We Picked
I compared the 14 listed products around the needs of a Ring Video Doorbell 2 owner: matching the doorbell’s required voltage and VA, choosing between a wired transformer and an outlet-powered adapter, and judging how clearly each product’s format supports installation. I gave more weight to products with a stated Ring-doorbell use case or a clearly identified output than to models whose broad doorbell-and-thermostat labeling leaves more compatibility checking to the buyer. Cable length, selectable voltage, and whether the product is a dedicated adapter also shaped the rankings.
The order reflects fit and decision simplicity for this specific doorbell, not a claim that one electrical rating suits every home. The Newhouse 16V 30VA model leads as a directly relevant wired candidate, while the Ring plug-in adapter and dual-voltage models serve different installation needs. Higher-output 24V products rank behind those picks unless the buyer has confirmed that the Ring Doorbell 2 supports the selected output. I also accounted for tradeoffs: cable-based options require routing space, broad-use transformers may call for more wiring knowledge, and a product’s name alone cannot establish safe compatibility with an existing circuit.
| transformer for ring doorbell 2 | Mounting type |
|---|---|
| GIVEUBED 24V 40VA Doorbell and | Plate mount |
| Newhouse Hardware 24V 40VA Doo | — |
| Newhouse Hardware 16V 30VA Doo | — |
| ChooKaChoo 24V Doorbell Transf | Wall mount |
| RAGNAROS 24V AC Doorbell Trans | — |
| Auspow 24V 40VA Doorbell Trans | Surface mount |
| EPLZON 24V 40VA Thermostat and | Wall mount |
| Hardwired Transformer for Ring | — |
| VIIVRIA 24V 40VA Doorbell Tran | — |
| Newhouse Hardware 3040TR Dual- | — |
| TytonClaw Dual-Volt Wired Door | Wall mount |
| VIIVRIA 24V AC Transformer wit | Wall mount |
| Ring Plug-In Adapter | — |
| Newhouse Hardware 3TRAN Tri-Vo | Surface mount |
Factors to Consider When Choosing Transformer For Ring Doorbell 2
Before choosing, separate the electrical match from the installation format. A transformer can have the right general purpose but still be unsuitable if its output does not match the doorbell’s requirements, or if your home’s wiring and chime need a different arrangement.
Match Voltage and VA to the Doorbell, Not the Product Name
Start with the Ring Video Doorbell 2 documentation and the label on your existing transformer, then compare both voltage and VA. Voltage identifies the output level, while VA describes the transformer’s rated capacity; neither number alone tells the whole story. A 24V 40VA model is not automatically a better replacement than a 16V 30VA unit, and a larger rating should not be treated as permission to exceed the doorbell’s specified input. Some products in this roundup are designed for thermostats as well as doorbells, which does not prove they suit every Ring setup. If the label is missing or hard to read, identify the wiring and transformer model before ordering rather than guessing from the old unit’s appearance. When specifications conflict, pause and ask a qualified installer to confirm the match.
Choose Between a Hardwired Transformer and a Plug-In Adapter
A hardwired transformer makes sense when you already have accessible low-voltage doorbell wiring and want a permanent installation. A plug-in adapter can be easier when the existing transformer is difficult to reach or unsuitable, but it only helps if an outlet is available within practical cable distance. Cable-based options in this roundup vary from a 16.4-foot lead to an 18-foot lead and a 315-inch cable, so measure the actual route rather than the straight-line distance. A long cable may need to pass through a wall or around a door frame, and exposed routing can affect appearance and create snag points. Avoid buying an adapter just because its setup sounds simpler: outlet access, cable routing, and the manufacturer’s compatibility details all have to work in your home.
Treat Dual-Voltage and Tri-Voltage Settings as a Choice to Verify
Selectable-output transformers can suit homes with different doorbell requirements, but they add a setup step that fixed-output models do not. The Newhouse 3040TR and TytonClaw offer 16V and 24V options, while the Newhouse 3TRAN lists 8V, 16V, and 24V outputs with different VA ratings. Check the actual terminal or selector instructions and confirm which output is active before connecting the Ring. Do not assume that a setting is correct because it worked for a previous chime or another smart doorbell. The extra flexibility is useful when replacing a shared or older system, yet it can create avoidable wiring mistakes for someone unfamiliar with transformer terminals. If you cannot confidently identify the output, choose professional help over trial and error.
Check the Existing Chime and Circuit Before Replacing Anything
The doorbell transformer is only one part of a wired setup: the chime, wiring path, and any connected devices can affect how a replacement should be installed. A transformer marketed for both doorbells and thermostats may not include the parts or instructions needed for your particular chime arrangement. Before removing the old unit, photograph its connections and note the labels, but do not rely on wire color as proof of function. Confirm whether your Ring Doorbell 2 setup uses an existing mechanical or digital chime and follow Ring’s guidance for that configuration. If the circuit’s layout is unclear, a qualified electrician can identify the transformer and wiring without risking an incorrect connection. This check can prevent buying a compatible-looking product that does not address the actual issue.
Pay for Flexibility or Cable Length Only When Your Setup Needs It
More output choices and longer leads are useful only when they solve a real installation constraint. If your existing low-voltage wiring is in place and the Ring’s requirements match a fixed-output model, paying for selectable voltage may add complexity without improving the fit. Conversely, a longer adapter cable can be worthwhile if the nearest outlet is far from the door, but excess cable needs a safe, tidy route. A dedicated Ring adapter is aimed at a simpler plug-in path, while universal-style transformers may suit buyers replacing a wired unit or serving more than one system. Compare the product’s stated electrical output and connection method before treating broad compatibility wording as a guarantee. Choose the least complicated option that meets the verified electrical and physical requirements.
Frequently Asked Questions
Can I use a 24V transformer with my Ring Video Doorbell 2?
Only use a 24V model if the current Ring Video Doorbell 2 documentation lists that output as compatible for your configuration. This roundup includes multiple 24V 40VA products, but their presence does not make every one suitable for every Ring installation. Check both voltage and VA, then confirm any chime or wiring requirements. If your existing transformer has a different rating, do not assume that moving to 24V is a safe upgrade. When the product label or doorbell specification is unclear, get the match confirmed before connecting it.
Is a plug-in adapter a good replacement for a hardwired transformer?
It can be a practical alternative if you have a nearby outlet, a workable cable route, and an adapter specifically compatible with your Ring model. It does not replace every function of a hardwired setup, particularly if your installation depends on existing chime wiring or a particular circuit arrangement. Measure the full route from outlet to doorbell and account for how the cable will enter or pass around the building. A long lead can reduce the need for electrical work, but it may be more visible than a wired installation. Confirm the adapter’s specifications and Ring compatibility before choosing it.
How do I know whether my current transformer needs replacing?
Start by checking the transformer’s output label and comparing it with Ring’s requirements for the Doorbell 2. A doorbell that loses power or behaves inconsistently can have several possible causes, including wiring, chime configuration, or a loose connection, so symptoms alone do not prove the transformer is faulty. Inspect only what is safely accessible, and do not open or work on mains-voltage equipment while it is energized. If the label is unreadable or the wiring is unfamiliar, ask an electrician to identify the unit and test the circuit. Replacing a transformer without diagnosing the issue may leave the original problem unresolved.
Should I choose a dual-voltage transformer if I am unsure which output I need?
A dual-voltage model gives you a choice, but it does not determine the correct setting for you. You still need to check the Ring Doorbell 2’s specifications and identify how the transformer terminals are configured. A selectable model can be helpful when replacing an older system with a known requirement, but an uncertain buyer may find a fixed-output, clearly matched product easier to install. Do not connect the doorbell to one setting and change it at random if the device fails to power up. If you cannot verify the correct output, have the wiring checked before choosing or installing the transformer.
Can a 24V 40VA transformer power my doorbell and thermostat together?
Some products in this lineup are labeled for both doorbells and thermostats, but that label does not confirm that one transformer can serve your particular devices together. The required output, total load, wiring arrangement, and manufacturer instructions all matter. Check the transformer’s stated capacity and the requirements of every connected device rather than relying on the product title. A setup that powers one device may not be appropriate for multiple loads. If you are adding a second device to existing wiring, ask a qualified installer to verify the circuit and transformer capacity.
Conclusion
For most buyers looking for a wired candidate specifically for Ring Video Doorbell 2, I would start with the Newhouse Hardware 16V 30VA, after confirming the unit matches the doorbell and home wiring. For best value, compare the fixed-output Newhouse option with the GIVEUBED, Auspow, or EPLZON 24V models only if your verified requirements call for 24V; their shared rating makes installation details and fit the deciding factors. For a premium flexibility pick, the Newhouse 3040TR or TytonClaw offers selectable 16V/24V output, best suited to someone who can set and verify the correct output. For beginners with outlet access, the Ring Plug-In Adapter is the most direct adapter-style route, while ChooKaChoo, RAGNAROS, and VIIVRIA cable options suit buyers whose outlet placement calls for a longer lead. For specific needs, the Newhouse 3TRAN is a tri-voltage candidate and the 315-inch VIIVRIA cable suits a long routing path, but both call for careful specification checks. The deciding rule is simple: match the Ring’s documented input first, then choose the wiring format that fits your home.
