Heavy-duty battery isolator on/off switch for 12V vehicle and auxiliary battery systems, rated to 275A at 12V.
This rotary battery isolator provides a simple manual disconnect between the battery and the connected electrical system. It is ideal for 4x4s, caravans, campers, trailers, service bodies, battery boxes, auxiliary power systems and general 12V accessory installations.
The large red rotary knob gives clear ON/OFF control, allowing the battery circuit to be isolated for maintenance, storage, emergency shut-off or to help prevent unwanted battery drain when the vehicle or system is not in use.
Product Details
- Product: Battery isolator / master disconnect switch
- SKU: DE935268
- Switch type: Rotary ON/OFF
- Voltage: 12V
- Current rating: 275A at 12V
- Approximate size: 69mm x 69mm base, approximately 75mm high
- Mounting: Four-hole mounting base
- Design: Enclosed housing with cable access points
- Colour: Red control knob with black/grey housing
Common Uses
- Main battery isolation for 12V vehicle systems
- Auxiliary battery and canopy power systems
- Caravan, camper, trailer and service body electrical setups
- Manual isolation for inverters, DC loads, accessories and charge circuits
- Battery box, workshop, touring and off-road accessory installations
- Storage isolation to help reduce unwanted battery drain
Key Features
- Heavy-duty 275A rated isolator switch for 12V systems
- Simple rotary ON/OFF operation
- Large red knob for easy operation
- Clear visual ON/OFF position indication
- Compact square mounting footprint
- Four mounting holes for secure installation
- Designed for high-current 12V accessory and battery circuits
- Suitable for 4x4, RV, caravan, trailer and marine-style electrical applications
Why Use a Battery Isolator?
- Allows the battery circuit to be physically disconnected when required
- Helps protect the electrical system during maintenance or repairs
- Can reduce parasitic battery drain during long-term storage
- Provides a quick manual shut-off point for auxiliary electrical systems
- Useful for isolating battery boxes, inverters, charge systems and accessory circuits
Installation Notes
- Install close to the battery or circuit being isolated where practical.
- Use correctly rated cable, terminals and lugs for the expected current load.
- Ensure all connections are clean, tight and protected from movement or short circuit.
- For high-current loads such as winches or inverters, confirm the current draw before installation.
- Disconnect the battery before fitting or wiring the switch.
Important: This product is an isolator switch only. It is not a fuse or circuit breaker. Always use appropriate circuit protection and correctly rated wiring for the application. High-current 12V electrical work should be carried out by a suitably qualified person.
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