Description
The Ionnic BMS-05L is a heavy-duty single-pole battery master switch designed to isolate 6–36V DC electrical systems. Its lockable L-handle provides deliberate ON/OFF control, while the robust construction and supplied terminal boots suit demanding vehicle and equipment installations.
Key Features
- 250A current rating for high-current battery circuits
- Lockable zinc-plated L-handle
- Single-pole master isolation
- Supplied with black, red and yellow protective terminal boots
- Durable Bakelite and metal construction
Specifications
- Part number: BMS-05L
- Operating voltage: 6–36V DC
- Current rating: 250A
- Contact material: Copper
- Handle: Zinc-plated L-handle
- Body: Bakelite and metal
- Ingress protection: IP66 / IP53, depending on installation configuration
- Poles: Single pole
Applications
- Automotive and commercial-vehicle battery isolation
- Marine and recreational-vehicle electrical systems
- Industrial machinery and mobile equipment
- Auxiliary-power and maintenance isolation
Selection and Installation
Confirm the system voltage, continuous and peak current requirements, cable size and mounting arrangement before installation. Fit the supplied terminal protection and verify secure connections and correct isolation operation before returning the equipment to service.




















