Hotop 24 Volt C Wire Adapter for Smart Thermostat, UL Listed 16.5ft Long Power Connector C Wire for All Versions of Smart Thermostat Compatible with Nest/Honeywell/Ecobee/Wyze
Price: $9.58 - $19.99
(as of Dec 07, 2025 14:56:49 UTC – Details)
Product description
Upgrade underpowered devices
UL certified, safe operation
23ft cable with gift cable clips
For doorbells 1.Loosen the screw behind the doorbell. 2.Link 2 wire tips to the two terminal on the back of the doorbell. 3.Switch on the 120V AC power, until the rim of the button flash white light. 4.Starts to work when the Power voltage is good.
For thermostats
1. Cut off the power of circuit breaker.
2. Install the wire from your 24 volt adapter to the “C” terminal and the other wire to the “RC” terminal. You need to use included jumper and connect from “RH” to “RC” terminals，if HVAC system has a cooling.
3. Plug the power adapter into the socket and turn on the power of the circuit breaker.
4. Install the panel on the thermostat.
• Input voltage: 120 V/AC, 60 Hz • Output voltage: 24 V, 0.3 A/ AC • Size (L*W): 1.9 in x 1.6in • Cable length: 23 ft
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Customer Reviews
4.5 out of 5 stars 1,240
4.4 out of 5 stars 3,022
4.1 out of 5 stars 735
4.4 out of 5 stars 61
4.2 out of 5 stars 124
4.2 out of 5 stars 124
Price
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$19.99$19.99 $16.99$16.99
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Compatibility
Doorbells/ thermostats Doorbells/ thermostats Thermostats Thermostats Doorbells Doorbells
Consist of
Power adapter Power adapter Power adapter Power adapter Adapter with resistor Adapter with resistor
Output
24V,500mA/AC 24V,500mA/AC 24V,500mA/AC 24V,500mA/AC 18V,500mA/AC 18V,500 mA/AC
Widely Use: Hotop C wire adapter for smart thermostats compatible with Nest/Ecobee/Honeywell/Wyze/Hive, smart thermostat, etc., and other devices that require constant 24 volt power for operation, enables you to charge your devices safety
Easy To Install: 2 pin non polarity wires support easy and quick install, assemble along the wall from your outlet to the thermostat without the wiring; Our cable is 5 m (16.5ft) long and you do not worry about the distance between the socket and the smart thermostat; This allows you to easily plug it into an electrical outlet inside or outside your house
Certificated Safety Nest Thermostat Power Supply: Hotop C wire adapter for smart thermostat is UL listed and has built in 2A thermal fuse short circuit protection, prevent short circuit, overvoltage, overcurrent, overheat, ensure charging safety
Safe and Convenient: a quick fix to the problem of “Low battery” you can charge it directly (plug adapter into outlet and power up); That means you don’t need to remove your thermostat in order to charge up the battery; With an output of 24V/300mA, a nice tool to meet your needs
What You Will Get: 1 pcs 24 Volt C wire adapter for smart thermostats, 1 bag (50 pieces) of cable clips, enough to meet your daily use
Customers say
Customers find the transformer easy to install and appreciate its functionality with Wyze video doorbells, though some report it doesn’t work with Nest learning thermostats. The quality and wire thickness receive mixed feedback – while some consider it a high-quality transformer that creates a C wire, others describe it as faulty with insufficient wire thickness. Power supply and cord length also get mixed reviews, with some reporting zero voltage output and finding the cord length ridiculous, while others say it’s plenty long.
