Battery Master Switch – Marine Battery Isolator | 4Boats
17540
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Battery Master Switch
Heavy Duty Isolator for Marine, RV & Commercial Vehicles
Ensure the safety and longevity of your electrical system with this professional-grade Battery Master Switch. Designed to eliminate power drain from the battery when your vehicle or boat is not in use, this isolator provides a reliable way to shut down electrical power quickly in emergencies or for routine maintenance.
Engineered for harsh environments, this switch features a robust housing and high-conductivity copper studs. Whether you are outfitting a yacht, a motorhome, or heavy agricultural machinery, this switch provides the heavy-duty performance required to handle high cranking loads and continuous power demands.
Key Features
- ✔ Universal Voltage: Compatible with 12V, 24V, and 48V DC systems.
- ✔ Heavy Duty Studs: 10mm (3/8") tin-plated copper studs for maximum conductivity.
- ✔ Security Design: Removable knob prevents unauthorized use or accidental activation.
- ✔ Weather Resistant: IP66 rated housing protects against powerful water jets.
Technical Specs
| Continuous Rating: | 275 Amps DC |
| Intermittent Rating: | 455 Amps DC |
| Cranking Rating: | 1250 Amps DC |
| Voltage Range: | 12V - 48V DC |
| Operation: | On / Off |
Typical Fitment Guide
| Application | System Type | Usage |
|---|---|---|
| Marine / Boats | 12V / 24V Inboard & Outboard | Main Battery Isolation |
| Caravans & RVs | Leisure Battery Systems | Static Storage Disconnect |
| Agricultural | Tractors & Harvesters | Safety Kill Switch |
OEM Part Number Cross Reference
| BEP Equivalent: | 701 |
| Blue Sea Equivalent: | 6006 / 9003e |
| Internal SKU: | 4B-BMS-01 |
Frequently Asked Questions
Can this switch be used on the negative side of the battery?
Yes, it can be installed on either the positive or negative cable, though it is most commonly used on the positive side for total system isolation.
Is this switch safe for engine compartments?
Yes, this unit is ignition protected, meaning it is designed to be used safely in environments where explosive fumes may be present, such as boat engine rooms.
Note: Please verify your vehicle model and year before purchasing.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
