Universal Switching Relay w/ Internal Transformer Zoom

Universal Switching Relay w/ Internal Transformer


Brand: Honeywell

Qty Price
/ each
$91.90 / box (2 units x $45.95)
In Stock! Ships in 24-48 Hours
(67 Available)


Application: Zoning
Width: 4-7/16"
Height: 6-1/4"
Power Method: 120V
Hertz: 60
Depth (Inches): 3-1/2"
Ambient Conditions: 0-90% RH non-condensing
-20 F to +120 F
Switch Action: Two SPST
plus PowerPile® rated low voltage SPST relay
Relays: Low Voltage SPST
Thermostat Compatibility: Honeywell Electromechanical
Electronic 2-wire
Electronic 3-wire
Connection Type: 2-Wire

Description for Honeywell R8845U1003

Honeywell R8845U1003 is a universal switching relay with internal transformer. This switching relay provides intermediate switching of line voltage and low voltage devices from a line voltage or low voltage controller. It is typically applied in Hydronic heating systems.

Honeywell Universal Switching Relays R8845U with 24 V transformer provide intermediate switching of line-and low-voltage devices from a line- or low-voltage controller and is typically applied in Hydronic heating systems.


  • Replaceable socketed relays
  • Two troubleshooting LED
  • Push-to-test button
  • Replaceable transformer fuse
  • Low-voltage contact rating for Powerpile applications
  • 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 24 V transformer supply
  • One model replaces many competitor models
  • One model may replace many Honeywell models:R182A,B,C,J; R482A,B,C,J; R845; R882A,B,C,J and RA832
  • Includes integral transformer, enclosure
  • Approvals of Canadian Underwriters Laboratories and Underwriters Laboratories Inc.

Universal Switching Relay w/ Internal Transformer

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