Resideo RC840T-347 Electromechanical Relay
The Resideo RC840T-347 Electromechanical Relay is a trade-grade solution for contractors needing to interface low-voltage thermostats with 347 VAC line-voltage resistive loads. Built for reliability in demanding environments, this switching relay features an integrated 24V transformer, eliminating the need for external power supplies and streamlining the footprint in wiring compartments. It is fully compatible with modern 2-wire and 3-wire 24V thermostats (R, W, C), making it a versatile direct replacement relay for baseboard heaters, radiant ceilings, and duct heaters. Use this unit to provide immediate relay activation without the typical startup delays found in thermal relays, ensuring tighter temperature control and superior comfort. The epoxy-soundproofed housing ensures silent operation, making it suitable for noise-sensitive residential or commercial installations. With 12 AWG terminal wires and a rating of 18 A at 347 VAC, it meets the rigorous standards required for high-voltage HVAC/R electrical components.
Key Benefits- Streamlined Integration: The built-in 24V transformer simplifies circuit design by providing a self-contained power source for the control signal.
- Universal Compatibility: Works seamlessly with battery-operated or power-stealing 24V 2-wire and 3-wire thermostats.
- Quiet Performance: Advanced epoxy-soundproofing technology allows for installation in occupied areas such as bedrooms and offices without audible switching noise.
- High Load Capacity: Rated for up to 18 A resistive loads at 347 Vac, suitable for significant electric heating relay applications.
- Speed of Response: Provides instantaneous switching for better regulation and energy efficiency compared to slower thermal alternatives.
Is this relay compatible with 3-wire thermostats?
Yes, the Resideo RC840T-347 is designed for 2-wire (R, W) and 3-wire (R, W, C) configurations, including electronic and mechanical models.
Can I use this for fast-cycling modulated heating equipment?
This electromechanical relay is optimized for on/off switching. For fast-cycling or modulated regulation, a solid-state relay like the RT850 series is generally recommended.
Where can this relay be mounted?
It is designed for mounting on the side of a standard electrical junction box, distribution panel, or directly within the wiring compartment of a baseboard heater.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $109.68
-65%$109.68
$38.39Resideo RC840T-347 Electromechanical Relay
The Resideo RC840T-347 Electromechanical Relay is a trade-grade solution for contractors needing to interface low-voltage thermostats with 347 VAC line-voltage resistive loads. Built for reliability in demanding environments, this switching relay features an integrated 24V transformer, eliminating the need for external power supplies and streamlining the footprint in wiring compartments. It is fully compatible with modern 2-wire and 3-wire 24V thermostats (R, W, C), making it a versatile direct replacement relay for baseboard heaters, radiant ceilings, and duct heaters. Use this unit to provide immediate relay activation without the typical startup delays found in thermal relays, ensuring tighter temperature control and superior comfort. The epoxy-soundproofed housing ensures silent operation, making it suitable for noise-sensitive residential or commercial installations. With 12 AWG terminal wires and a rating of 18 A at 347 VAC, it meets the rigorous standards required for high-voltage HVAC/R electrical components.
Key Benefits- Streamlined Integration: The built-in 24V transformer simplifies circuit design by providing a self-contained power source for the control signal.
- Universal Compatibility: Works seamlessly with battery-operated or power-stealing 24V 2-wire and 3-wire thermostats.
- Quiet Performance: Advanced epoxy-soundproofing technology allows for installation in occupied areas such as bedrooms and offices without audible switching noise.
- High Load Capacity: Rated for up to 18 A resistive loads at 347 Vac, suitable for significant electric heating relay applications.
- Speed of Response: Provides instantaneous switching for better regulation and energy efficiency compared to slower thermal alternatives.
Is this relay compatible with 3-wire thermostats?
Yes, the Resideo RC840T-347 is designed for 2-wire (R, W) and 3-wire (R, W, C) configurations, including electronic and mechanical models.
Can I use this for fast-cycling modulated heating equipment?
This electromechanical relay is optimized for on/off switching. For fast-cycling or modulated regulation, a solid-state relay like the RT850 series is generally recommended.
Where can this relay be mounted?
It is designed for mounting on the side of a standard electrical junction box, distribution panel, or directly within the wiring compartment of a baseboard heater.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Resideo RC840T-347 Electromechanical Relay is a trade-grade solution for contractors needing to interface low-voltage thermostats with 347 VAC line-voltage resistive loads. Built for reliability in demanding environments, this switching relay features an integrated 24V transformer, eliminating the need for external power supplies and streamlining the footprint in wiring compartments. It is fully compatible with modern 2-wire and 3-wire 24V thermostats (R, W, C), making it a versatile direct replacement relay for baseboard heaters, radiant ceilings, and duct heaters. Use this unit to provide immediate relay activation without the typical startup delays found in thermal relays, ensuring tighter temperature control and superior comfort. The epoxy-soundproofed housing ensures silent operation, making it suitable for noise-sensitive residential or commercial installations. With 12 AWG terminal wires and a rating of 18 A at 347 VAC, it meets the rigorous standards required for high-voltage HVAC/R electrical components.
Key Benefits- Streamlined Integration: The built-in 24V transformer simplifies circuit design by providing a self-contained power source for the control signal.
- Universal Compatibility: Works seamlessly with battery-operated or power-stealing 24V 2-wire and 3-wire thermostats.
- Quiet Performance: Advanced epoxy-soundproofing technology allows for installation in occupied areas such as bedrooms and offices without audible switching noise.
- High Load Capacity: Rated for up to 18 A resistive loads at 347 Vac, suitable for significant electric heating relay applications.
- Speed of Response: Provides instantaneous switching for better regulation and energy efficiency compared to slower thermal alternatives.
Is this relay compatible with 3-wire thermostats?
Yes, the Resideo RC840T-347 is designed for 2-wire (R, W) and 3-wire (R, W, C) configurations, including electronic and mechanical models.
Can I use this for fast-cycling modulated heating equipment?
This electromechanical relay is optimized for on/off switching. For fast-cycling or modulated regulation, a solid-state relay like the RT850 series is generally recommended.
Where can this relay be mounted?
It is designed for mounting on the side of a standard electrical junction box, distribution panel, or directly within the wiring compartment of a baseboard heater.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
