Differential Pressure Switch Application HVAC Contact Form SPDT Electrical Connection Type Screw Terminals Electrical Rating 1/4 hp @ 250V AC 15 A @ 125 250 480V AC 60 Hz Resistive 1/8 hp @ 125 V AC Housing Type Standard Housing Input Voltage 120 to 480V AC 125V AC 250V AC Maximum Differential Pressure Setting 2 psid Maximum Operating Temperature 140 Degrees F Maximum Pressure Rating 35 psi Maximum Pressure Setting 2 psid Minimum Differential Pressure Setting 0.5 psid