Resideo by Honeywell R841C1227 Electric Heat Relay SPST 24VAC 240V with Integral Transformer

The Resideo by Honeywell R841C1227 is a professional-grade electric heating relay designed for use with 2-wire, 24 VAC thermostats to control electric heating equipment such as baseboard heaters, ceiling cable heaters, and duct heaters. This relay features Single Pole, Single Throw (SPST) switching and includes an integral transformer for simplified installation.

Key Features:

• Switches up to 5,000 watts (22 amps at 240V) of electric heating load
• Compatible with 208V, 240V, and 277V heating systems
• 24 VAC coil voltage works with standard low-voltage thermostats
• Operates reliably with each thermostat cycle (4 to 6 cycles per hour)
• Contacts make and break in approximately 75 seconds for smooth operation
• Quiet operation ideal for residential and light commercial applications
• Mounts in any position for flexible installation
• Includes 1/2-inch male conduit bushing
• UL listed for safety and reliability

Technical Specifications:

• Dimensions: 3-7/8" H x 2-13/16" W x 1-1/2" D
• Switching Configuration: SPST (Single Pole, Single Throw)
• Contact Rating: 7 Amps at 24 VAC coil, 22 Amps at line voltage
• Maximum Load: 5,000 watts / 5,280 watts (varies by voltage)
• Operating Temperature: -20°F to 150°F
• Frequency: 50/60 Hz

The R841C1227 mounts directly to a standard 4" x 4" junction box and is compatible with standard 2-wire low-voltage thermostats. The built-in transformer eliminates the need for an external power supply, simplifying installation for HVAC professionals. Manufactured by Resideo (formerly Honeywell Home), this relay reflects decades of proven HVAC engineering and quality.