SW180B-108 Contactor Solenoid Relay for Marine Winches Trailers Automotive Industrial 12V DC 100A The SW180B-108 Contactor Solenoid Relay is a 12V DC electrical switching component rated for up to 100A.It is designed for use in marine winch systems, trailer electrical circuits, automotive applications, and industrial where -current load control is required. A contactor solenoid relay uses an electromagnetic coil to open or close -current circuits.The SW180B-108 operates with a 12V DC control and switches loads up to 100A.It is intended for replacement or integration into existing 12V DC systems compatible with this model number and specification. Key characteristics include: - 12V DC coil voltage - 100A continuous current rating - Construction suitable for environments subject to vibration and temperature variation - Compact form factor for installation in confined spaces - Electromechanical switching Common applications include: - Marine winch motor control - Trailer brake and winch activation - Automotive starter, fan, or auxiliary power circuits - Industrial motor and pump control where 12V DC actuation and 100A load switching are required Wiring requires connection of the 12V DC control source to the coil terminals, grounding of the appropriate coil terminal, and connection of the load to the main output terminals.Installation must follow standard electrical practices with secure, insulated connections. For maintenance, inspect terminals for corrosion or physical damage, clean contacts as needed with an electrical cleaner, and verify coil resistance and continuity using a multimeter.Replace the unit if operational failure or abnormal heating occurs. The SW180B-108 is compatible with systems originally equipped with this part number.It restores functionality when used as a direct replacement. This product is not manufactured by the brand.Model and brand mentions are for compatibility guidance only.