Air Pressure Switch Contact Form SPDT Electrical Connection Type Hardwired Electrical Rating 1 A Pilot Duty @ 120V AC 5 A Non-Inductive @ 28V AC 5 A Non-Inductive to 277V AC Housing Material Plastic Housing Type Open Mounted Input Voltage 277V AC Maximum Differential Pressure Setting 0.12 in wc Maximum Operating Temperature 180 Degrees F Maximum Pressure Rating 1 psi Maximum Pressure Setting 4 in wc Minimum Differential Pressure Setting 0.07 in wc