Resideo RC840 Electromechanical Relay
The Resideo RC840 Electromechanical Relay is a versatile switching solution designed for seamless integration between line voltage equipment and 24V low voltage controls. Engineered for multi-voltage applications, this relay handles 120 Vac, 208 Vac, 240 Vac, 277 Vac, and 347 Vac, making it a standard truck-stock item for commercial and residential technicians. It operates with a 24V/40 mA/1 VA control signal and provides reliable on/off switching for resistive loads, ensuring compatibility with 2-wire or 3-wire thermostats. The unit is rated for ambient temperatures ranging from -4°F to 140°F, allowing for installation in demanding mechanical environments. Its compact, junction box mountable design simplifies field wiring when transitioning from low voltage logic to heavy-duty power loads. For contractors troubleshooting electric heating systems or circulator pumps, the RC840 provides a robust interface that eliminates the complexities of mixed-voltage signaling.
Key Benefits for Technicians- Universal Voltage Compatibility: Supports a wide range of input voltages from 120V to 347V, reducing the need to carry multiple specialized relays.
- Flexible Control Wiring: Fully compatible with both legacy 2-wire and modern 3-wire 24V thermostats for broad system adaptability.
- Durable Thermal Protection: Rated for operational stability in high-ambient environments up to 140°F.
- Easy Installation: Features a standard 1/2-inch NPT nipple for quick mounting to local electrical boxes or enclosures.
- Silent Operation: Uses an electromechanical design that minimizes audible switching noise in residential applications.
Can the RC840 be used to control electric baseboard heaters?
Yes, this relay is specifically designed to allow a 24V thermostat to control line-voltage resistive loads like electric baseboard or radiant ceiling heaters.
What is the maximum load capacity for this relay?
The RC840 is typically rated for 22A at 120/208/240 Vac and 19A at 277 Vac for resistive loads, though you should always verify the specific FLA/LRA on the nameplate for inductive loads.
Is a separate transformer required?
This model contains a built-in transformer to power its internal coil, but you must ensure your 24V control circuit requirements do not exceed the 40 mA control signal rating.
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: $64.52
-65%$64.52
$22.58Resideo RC840 Electromechanical Relay
The Resideo RC840 Electromechanical Relay is a versatile switching solution designed for seamless integration between line voltage equipment and 24V low voltage controls. Engineered for multi-voltage applications, this relay handles 120 Vac, 208 Vac, 240 Vac, 277 Vac, and 347 Vac, making it a standard truck-stock item for commercial and residential technicians. It operates with a 24V/40 mA/1 VA control signal and provides reliable on/off switching for resistive loads, ensuring compatibility with 2-wire or 3-wire thermostats. The unit is rated for ambient temperatures ranging from -4°F to 140°F, allowing for installation in demanding mechanical environments. Its compact, junction box mountable design simplifies field wiring when transitioning from low voltage logic to heavy-duty power loads. For contractors troubleshooting electric heating systems or circulator pumps, the RC840 provides a robust interface that eliminates the complexities of mixed-voltage signaling.
Key Benefits for Technicians- Universal Voltage Compatibility: Supports a wide range of input voltages from 120V to 347V, reducing the need to carry multiple specialized relays.
- Flexible Control Wiring: Fully compatible with both legacy 2-wire and modern 3-wire 24V thermostats for broad system adaptability.
- Durable Thermal Protection: Rated for operational stability in high-ambient environments up to 140°F.
- Easy Installation: Features a standard 1/2-inch NPT nipple for quick mounting to local electrical boxes or enclosures.
- Silent Operation: Uses an electromechanical design that minimizes audible switching noise in residential applications.
Can the RC840 be used to control electric baseboard heaters?
Yes, this relay is specifically designed to allow a 24V thermostat to control line-voltage resistive loads like electric baseboard or radiant ceiling heaters.
What is the maximum load capacity for this relay?
The RC840 is typically rated for 22A at 120/208/240 Vac and 19A at 277 Vac for resistive loads, though you should always verify the specific FLA/LRA on the nameplate for inductive loads.
Is a separate transformer required?
This model contains a built-in transformer to power its internal coil, but you must ensure your 24V control circuit requirements do not exceed the 40 mA control signal rating.
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
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Description
The Resideo RC840 Electromechanical Relay is a versatile switching solution designed for seamless integration between line voltage equipment and 24V low voltage controls. Engineered for multi-voltage applications, this relay handles 120 Vac, 208 Vac, 240 Vac, 277 Vac, and 347 Vac, making it a standard truck-stock item for commercial and residential technicians. It operates with a 24V/40 mA/1 VA control signal and provides reliable on/off switching for resistive loads, ensuring compatibility with 2-wire or 3-wire thermostats. The unit is rated for ambient temperatures ranging from -4°F to 140°F, allowing for installation in demanding mechanical environments. Its compact, junction box mountable design simplifies field wiring when transitioning from low voltage logic to heavy-duty power loads. For contractors troubleshooting electric heating systems or circulator pumps, the RC840 provides a robust interface that eliminates the complexities of mixed-voltage signaling.
Key Benefits for Technicians- Universal Voltage Compatibility: Supports a wide range of input voltages from 120V to 347V, reducing the need to carry multiple specialized relays.
- Flexible Control Wiring: Fully compatible with both legacy 2-wire and modern 3-wire 24V thermostats for broad system adaptability.
- Durable Thermal Protection: Rated for operational stability in high-ambient environments up to 140°F.
- Easy Installation: Features a standard 1/2-inch NPT nipple for quick mounting to local electrical boxes or enclosures.
- Silent Operation: Uses an electromechanical design that minimizes audible switching noise in residential applications.
Can the RC840 be used to control electric baseboard heaters?
Yes, this relay is specifically designed to allow a 24V thermostat to control line-voltage resistive loads like electric baseboard or radiant ceiling heaters.
What is the maximum load capacity for this relay?
The RC840 is typically rated for 22A at 120/208/240 Vac and 19A at 277 Vac for resistive loads, though you should always verify the specific FLA/LRA on the nameplate for inductive loads.
Is a separate transformer required?
This model contains a built-in transformer to power its internal coil, but you must ensure your 24V control circuit requirements do not exceed the 40 mA control signal rating.
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.
