Pressure Switch 1910-5, Application Frost and Ice Detection, Clogged or Dirty Filter Detection, Air Flow Control, Contact Form SPDT, Electrical Connection Type Screw Terminals, Electrical Rating 1/4 HP @ 250 V AC, 60 Hz, 1/8 HP @ 125 V AC, 15 A @ 120 to 480 V AC, 60 Hz Resistive, Derate to 10 A for Operation at High Cycle Rates, Maximum Differential Pressure Setting 5.5 in wc, Maximum Operating Temperature 180 Degrees F, Maximum Pressure Rating 45 in wc, Maximum Pressure Setting 5.5 in wc