The high pressure cut-out switch SPST open on pressure rise 400 PSI/300 PSI 24–250V with 1/4 inch female SAE flare and deflator (MS-43931) is a fixed setting high pressure control for refrigeration and air conditioning systems; opens contacts on pressure rise at approximately 400 PSI and auto-resets on pressure fall at approximately 300 PSI; single pole single throw normally closed contact configuration; rated 6 amps at 24–250 volts AC; pressure connection type 1/4 inch female SAE flare with integrated deflator port; hermetically sealed diaphragm sensing element; tamper-proof compact mount design with 18 inch lead wires and 1/2 inch stripped ends; suitable for high side safety cut-out applications in residential and light commercial HVACR equipment; UL, CE, and VDE recognized component.