This 12 Volt relay is a heavy-duty unit designed to mount outside the electrical box. It's made with materials that lock out moisture and chemicals. The large copper terminals assure good solid contact with your wiring. The stainless steel base plate allows the relay to be mounted in any position. Rated for 65 A .12 Volt relayHeavy duty unitDesigned to mount outside of electrical boxRated for 65 amps