ATC Diversified SPM-120-ACA Temperature Switch Relay - 120 VAC, SPDT

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The ATC Diversified SPM series non-volatile latching temperature switch relay monitors a normally-closed-low temperature switch. It incorporates a bi-stable relay that retains its state during power failures. LEDs indicate the status of the relay, and connections for an external reset button are provided for manual control. The reset inputs of multiple units may be connected to a single push button as long as proper polarity is observed when making the connections. Under normal conditions the temperature switch is closed and the relay is de-energized. When the temperature switch opens, the relay energizes and latches on until the temperature switch re-closes and the reset button is pressed. The unit will function properly with zero to 2 kOhms of resistance in series with the temperature switch.


  • 120 VAC, 50/60 Hz
  • SPDT (Single Pull Double Throw), 10A Contact Rating
  • Monitors Normally-Closed Temperature Switch
  • Relay Energizes and Latches when Temperature Switch Opens
  • LED’s Indicate Normal and Fault Conditions
More Information
Features Single Channel
Manufacturer ATC - Diversified
Type Seal Failure Alarms
Additional Skus SPM120ACA
Additional Details

*Product appearance may vary based on configuration!*

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