Single Pole Single Throw (SPST): Direct action simplifies wiring configurations during refrigeration repair

For technicians performing replacements

Operating at a 120Vac supply voltage

reducing mechanical hum

if the diagnostic confirms the control board is not processing the flame rectification signal

Schneider Electric (Barber Colman) MC-431 Motor Els PW 17895 Single Pole Single Throw (SPST):The Schneider Electric MC 431 is a high torque 2 position electric damper actuator engineered for precise control in commercial HVAC systems, including air handlers and rooftop units. Operating on a 120V motor, this unidirectional actuator provides 220 lb in torque to drive large dampers or valves where a spring return is not required. Designed for immediate field application, the MC 431 serves as the direct replacement for EA 31, MC 441, and MC 451