🚚 EHDIS 12V 120A 4 Pin Car Relay Black Box Battery Set for Heavy Vehicles - Perfect for Trucks, Excavators, Vans, Boats, and More! Review

Works well as a normally open relay. A small control current turns on a much larger current quickly and reliably; Remove the control current and the relay switches off. In my case the relay drives a couple of heavy 12V motors. This relay is plastic cased and quite large: 1.8 inch die plus mounting tab and terminals.

I used this to turn on the inverter in my work van. I wanted the inverter to be connected to an accessory powered switch so we couldn't accidentally leave something connected and drain the battery. Works flawlessly. I disconnected power to the relay from the ignition source and applied battery power to the inverter through the relay. Even if the switch is on, the inverter will turn off when the van is turned off. You need to ground the bottom of the relay. Mine didn't have a schematic, but it's

I immediately postponed the consideration, wanted to see how the device held up, for about 6 months. I used this to replace a high current relay in my automatic fuse box under the hood of my car. For some reason my fan relay melted in the fuse box and couldn't replace the factory relay. with a relay as far as it works, but I wish it was built to use a socket instead of exposed terminals. The other problem is that if you're using this in a circuit controlled by your car's computer, like my fan…