12V relays

A 12V relay is an electromagnetic switch with a 12 volt coil that lets a dashboard switch control a heavy current to work lights, beacons or a trailer socket. This page lists the 12V relays in the range: 4-pin make relays and 5-pin changeover relays from 20A to 70A, micro and mini ISO bodies, relays with a suppression diode or resistor, and matching sockets and holders. Every unit suits 12 volt tractors, quads, pickups and trailers.

71 products

Choosing a 12V relay

Pick the contact rating from the load: two 55W halogen work lights draw 9A on 12V and need a 20A relay; four draw 18A and need a 30A relay; LED lights draw a fifth of that. A 4-pin relay switches one circuit and is the right choice for a beacon or work light bank. A 5-pin relay switches between two circuits, such as dipped and main beam. Fit a relay with a diode where an electronic switch or control unit drives the coil. Pair the relay with a fuse from fuses and fuse holders rated just above the load, and see the 24V relays page for 24 volt machines. All relays are listed with their pin count and rating.

Guides for relays