Why you need it Quickly isolates the battery to protect electrical systems and prevent battery drain during storage, maintenance, or when working on wiring Reduces risk of backfeed and accidental shorts by providing a clear on/off/offout control Simple, reliable control for a wide range of vehicles and marine applications What it is and compatibility Battery cut off switch / isolator switch Operation: 12V 32V DC, continuous current up to 200A Suitable for cars, SUVs, trucks, motorcycles and boats Mounting hole diameter: 38 mm Operating temperature range: 30 C to +60 C How it works Three switch positions: ON, OFF, OUT Turn to ON to power on the circuit Turn to OFF to power off Turn to OUT to disconnect the external circuit; the cover can be removed when in OUT Construction and durability Made of plastic and brass Robust, antiaging and wear resistant Designed to operate reliably in harsh marine conditions and to ensure safety Compatible with a 12V 32V electrical system Use scenarios vehicle storage or maintenance: isolate the battery to prevent drain during long periods of inactivity Boats and marine applications: quick disconnect in rough conditions or during docking, with a cover removable in OUT for access Fleets, motorcycles and trucks: simple shutoff when parked, insured by a robust 200A continuous rating Specifications at a glance Voltage: 12 32V DC Continuous current: 200A at 12V Temperature range: 30 C to +60 C Mounting hole: 38 mm Material: plastic + brass Positions: ON, OFF, OUT Cover: removable when OUT to allow access