The 4-1618388-6 is a 1-pole Contactor with DC coil. 1 form-A (SPST-NO) contact configuration. Studs, #10-32 threaded (Electrical connection is made to the tab at the base of the stud). Bottom mount and male 10mm x M8 threaded terminals. Designed to be the lowest cost sealed contactor in the industry with its current rating (500+A carry, 2000A interrupt at 320VDC). Hermetically sealed intrinsically safe, operates in explosive/harsh environments with no oxidation or contamination of coils or contacts, including long periods of non-operation. Typical applications include battery switching and backup, DC voltage power control, circuit protection and safety. Designed and built in accordance to AIAG QS9000. Designed and built in accordance to AIAG QS9000 High voltage DC contactor Versatile coil/power connection Harsh Environment and Mil Spec compatible Applications Industrial, Power Management, Automation & Process Control, Automotive, Safety