A manual battery disconnect switch is a switch that is installed in an electrical system that runs on a battery. A primary consideration for the selection of a battery disconnect switch is the output of the alternator. This should be the highest continuous output in the vehicle. The battery disconnect switch should be able to withstand an intermittent current that is a least equal to the full discharge of the battery bank for about 10 seconds. This should prevent the contacts from welding shut and destroying the ability of the switch to operate. The battery disconnect switch is operated manually with a lever, a key or a knob. Continuous current ratings range from 100 amps to 500 amps. Intermittent current ratings range from 125 amps up to 3,000 amps. Voltage ratings range from 6 volts DC to 48 volts DC. Contacts are offered in silver, silver-plated brass, silver-plated copper and copper. Terminals are offered in 3/8-24 inches, M8, M10 and M12 sizes. Terminal materials include brass, copper, Inox, nickel-plated brass and zinc-plated steel. IP4X IP43 IP54 IP65 IP66 IP67 IP68 and IP69K Ingress Protection Approvals are available.

Littelfuse and Blue Sea offer manual battery disconnect switches.