Models SO & CSO

Download Data Sheet for Models SO  & CSO

Models SO  & CSO

Schematic - Pin Diagram for Models SO  & CSO

Metric Dimensions are shown in mm (Shown in green)
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Standard Marking System
Standard Marking System
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1/2" disc self-hold temperature limiting control.  In a fault condition, the control opens activating an internal heat source which holds the device in an open condition until the power is removed and the unit is allowed to cool.  The control then resets allowing continued operation.


A snap-action self-hold thermostat for motor and appliance applications.


  • Snap-action device for quick break switching action
  • Internal heat source provides a low profile design for better fit into tight spaces.
  • Self-hold functionality available for both 120 VAC and 240 VAC applications.

Contact Ratings

Model SO

16 amps 250 VAC 6,000 cycles

10 amps 250 VAC 3,000 cycles
16 amps 250 VAC 1,000 cycles

Model CSO
16 amps 250 VAC 10,000 cycles

Calibration Range

  • Available with nominal calibration temperatures from 40º C to 200º C

UL Recognitions

CSA Certifications