Suitable for use in high-vibration, wet, dusty environments. Insulated. Normally open. SPST. No moving parts. Housing: heat sink/encapsulated components. Voltage rating: 9-31V. Terminals: steel 5/16" -18 thread, hex nuts and lockwashers included. 2 16AWG stranded wires. Continuous rating: 85A. Bracket mounting: 4 slots 2.1" x 4.44". Wide temperature operating range -40° C to 85° C.