Pressure Switch, Air Compressor, Manual Switch Action None, (1) Port, 3/8 In. FNPT, Pressure Switch Factory On/Off Setting 120/150 psi, 1/4 In. Compression Pressure Switch Unloader, Pressure Switch Differential 15 to 70 psi, Pressure Switch Range 45 to 160 psi, Pressure Switch Electrical Contact Form 3PST, Pressure Switch Action Standard, NEMA Rating 1, Series MDR3, HP @ 1 Phase - 120V 2, HP @ 1 Phase - 240V 5, HP @ 3 Phase - 240V 7-1/2, HP @ 3 Phase - 480V 15