Resideo R8229A1021 Relay

Electric Heat Relay, 24Vac Coil Voltage, DPST Switching, Normally Closed Relay and Contactors for Load Control Systems, Full Load Contact Ratings: 2.8 Amp @ 600Vac, 3.5 Amp @ 480Vac, 7 Amp @ 120/208/240/277 Vac, Locked Rotor Contact Ratings: 14 Amp @ 600Vac, 17.5 Amp @ 480Vac, 35 Amp @ 120/208/240/277 Vac, Resistive Contact Ratings: 10 Amp @ 600Vac, 12.5 Amp @ 480Vac, 25 Amp @ 120/208/240/277Vac, -40-165 Degree Temperature Rating, #10 Combination Head Screws for Electrical Connection, Includes Extra Mounting Hardware

R8229A1021 is the direct replacement for HN61DC024

Resideo R8229A1021 Electric Heat Relay – 24VAC Coil, DPST, Normally Closed Load Control Relay

The Resideo R8229A1021 Relay is a high-performance electric heat relay designed for dependable load control in HVAC and electrical systems. Featuring a 24VAC coil voltage and DPST normally closed switching, this relay ensures continuous operation of connected loads—even in the event of a control wiring issue or relay malfunction.

Engineered for efficiency, the R8229A1021 consumes no power while the load is energized, requiring power only when shedding the load. Its rugged construction, wide temperature tolerance, and high contact ratings make it ideal for electric heat applications, load management systems, and commercial control panels.

Key Features & Benefits

• Normally closed DPST relay for reliable load control

• Failsafe operation keeps the load running during wiring or control failures

• Energy-efficient design uses power only when shedding load

• 24VAC coil voltage for compatibility with standard HVAC controls

• High contact ratings suitable for electric heat and high-load applications

• Operates directly from pilot-duty rated relays

• Durable construction for long service life

• Includes extra mounting hardware for easy installation

• UL and CSA recognized for safety and compliance

Electrical Specifications

• Model: R8229A1021

• Brand: Resideo

• Relay Type: Electric Heat Relay / Load Control Relay

• Coil Voltage: 24 VAC

• Switching: DPST (Double Pole, Single Throw)

• Contact State: Normally Closed

• Frequency: 60 Hz

Contact Ratings

• Full Load (AFL):

  • 2.8 A @ 600 VAC

  • 3.5 A @ 480 VAC

  • 7.0 A @ 120/208/240/277 VAC

• Locked Rotor (ALR):

  • 14 A @ 600 VAC

  • 17.5 A @ 480 VAC

  • 35 A @ 120/208/240/277 VAC

• Resistive Load:

  • 10.0 A @ 600 VAC

  • 12.5 A @ 480 VAC

  • 25 A @ 120/208/240/277 VAC

Mechanical & Environmental

• Electrical Connections: #10 combination head screws

• Operating Temperature:

  • -40°F to +165°F (-40°C to +74°C)

• Dimensions:

  • 2-3/16" H × 2-3/32" W × 2-1/4" D

  • (56 mm H × 53 mm W × 57 mm D)

• Includes: Extra mounting hardware

Certifications & Approvals

• UL: Component Recognized (Underwriters Laboratories)

• CSA: Canadian Standards Association Recognized

• Tradeline: Super Tradeline

Applications

• Electric heat systems

• HVAC load control and demand management

• Commercial and residential control panels

• Power shedding and energy management systems

The Resideo R8229A1021 Electric Heat Relay delivers failsafe operation, high electrical ratings, and dependable performance, making it a trusted choice for HVAC professionals and electrical installers.