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Honeywell RA889A1001 Switching Relay

Part Number: RA889A1001
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Honeywell RA889A1001 Switching Relay
Honeywell RA889A1001 Switching Relay
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Honeywell RA889A1001 Switching Relay with internal transformer

The RA889A Switching Relay provides intermediate switching of line- and low-voltage devices from a line or low voltage controller and is typically applied in hydronic heating systems.


  • High load switching capability.

  • Troubleshooting LED.

  • Push-to-test button.

  • Replaceable transformer fuse.

  • Long-life DC relay drive control technology.

  • Relay for use with external 24 Vac or 24 Vdc supply, with line-voltage control, or with internal 24V transformer supply.

  • One model replaces many Honeywell models

  • Perfect choice when converting from a 2-wire 750 mV system to a low voltage conventional or WiFi thermostat


Product Specifications

  • Description: Enclosed switching relay with internal transformer, Spdt line voltage relay, plus Spst low voltage relay with Powerpile rating. 120V/60Hz 15 AFL/30 ALR ratings one line voltage contacts

  • Application: For switching of line- and low-voltage devices from a line or low voltage controller

  • Switching Action: SPDT, plus PowerPile® rated low voltage SPST relay

  • Thermostat Heat Anticipator Setting: 0.12A

  • Transformer Primary Rating: 120 Vac, 60 Hz

  • Transformer Secondary Rating: 24 Vac, 12 VA max., 9 VA available for external load. Secondary protected by replaceable 1A automotive fuse.

  • Temperature Range (F): (Ambient) -20 F to +120 F.  Temperature Range (C): (Ambient) -29 C to +49 C

  • Thermostat Compatibility: Honeywell electromechanical and electronic 2- or 3-wire

  • Dimensions (in.): 6 1/4 in. high x 4 7/16 in. wide x 3 1/2 in. deep.  Dimensions (mm): 159 mm high x 118 mm wide x 89 mm deep

  • Operating Humidity Range (% RH): 0 to 90% RH, non-condensing

  • Electrical Ratings (Primary Voltage): 120V, 60 Hz

  • Replacement Parts: 32002190-001 Circulator Replacement Relay

  • Contacts Electrical Rating Contacts Max. Connected Load: 2000 VA

  • Contacts Electrical Ratings (120 VAC AFL): 15 amps.  Contacts Electrical Ratings (120 VAC ALR): 30 amps