175185 degree electric fan thermostat relay switch kit for your cooling system. This kit provides automatic fan control to help prevent overheating and improve cooling efficiency. Key specifications Voltage and current: 12V and 40 Amp capacity Relay: 4pin relay with pigtail for easy wiring Temperature trigger: activates around 175185 degrees Plumbing fittings: compatible with 3/8 inch and 1/2 inch pipe Complete kit: includes the relay switch, circuit breaker, terminals, wires, and mounting screws What's included and what it does The kit includes all components needed to connect to your cooling fan system Relay switch and circuit breaker for reliable fan operation and protection Terminals and wires for secure connections Mounting screws for straightforward installation Pigtail for easy wiring integration Benefits and why you need it Automatic temperature control: the thermostat turns the fan on and off based on engine or system temperature to maintain cooling Reliable 12V operation with a robust 40A relay for consistent performance Quick installation: complete wiring and mounting hardware included, reducing setup time Flexible plumbing options: 3/8' and 1/2' pipe fittings to fit common cooling lines 23 practical use scenarios Automotive cooling system: install to control the radiator fan, helping prevent overheating during heavy load or ambient temperatures Small engine or generator cooling: use on portable or stationary engines to maintain safe operating temperatures and protect components Marine or boat engine cooling: suitable for 12V cooling circuits in compact marine setups, providing automatic fan control for steady temperature management Notes Designed for 12V electrical systems and uses a 4pin relay for reliable switching Temperature activation range is 175185 degrees Includes all components for installation, including mounting screws and wiring