Stelpro USA

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Since Tuesday, 02/23/2021 04:00
Eastern Time Zone

Low Voltage Electromechanical Relay


A relay that comes with or without a 24 V transformer (6000 W @ 600 V).

Product images

  • R841 | FACE


  • Suitable for two-wire 24 V thermostats
  • Compatible with T822K1018U and T87K1007U thermostats
  • Compact size for easy installation in tight spaces
  • 120 V to 600 V
  • Duct socket for easy installation


  • All or nothing (on/off)
  • With a 24 V transformer (except the R841D1036 w/o a transformer)
  • Compatible with the T822K1018U and T87K1007U thermostats (the R841D1036 w/o a transformer is also compatible with the STE241 and D010 thermostats)
  • Installing more than four relays without a transformer to the same thermostat is not recommended (two relays without a transformer if connected to a STE241 thermostat)
  • No additional relay can be connected to the same control circuit as a relay with a transformer


  • These relays can be installed in an external junction box
  • These relays may or may not be installed in the junction box of the heating unit (see the accessories table for the heating unit)


  • One year