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Blue Sea 600A HD-Series Heavy Duty On/Off Battery Switch
Blue Sea 600A HD-Series Heavy Duty On/Off Battery Switch
Ignition protected, surface or rear panel mounting, high-current isolator
Key features: Rated for 600A continuous current, Clear ON/OFF position indication, Ignition protected design for engine rooms, Heavy-duty construction for marine environments.Highlights:Control Knob: Ergonomic knob for easy switching between On and Off positions,OFF Position: Clear OFF indication at the top for safety verification,Continuous Rating: Rated for 600A continuous current for heavy duty applications,Safety Certifications: Ignition protected and Marine UL Listed markings.
Rear housing view displaying heavy-duty terminal studs and reinforced mounting points for secure cable connections.Key features: Two 1/2 inch (M12) terminal studs, Tin-plated copper for maximum conductivity, Standard mounting hole pattern, Rear panel ignition protection.
Dual switch installation demonstrating the compact footprint and clean mounting aesthetics suitable for crowded panels.
Marine installation example showing the switch isolating a starboard engine battery bank on a vessel.
Technical drawing detailing the 3.85 inch (97.79mm) square housing and 3.00 inch (76.20mm) mounting hole centers. 
Regular price
$158.00
Availability:
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DESCRIPTION
Heavy-duty battery isolation for marine and 4WD power systems
When you’re running high-current loads on a boat, caravan, or touring 4WD, a reliable battery isolator switch is a core safety and maintenance component. The Blue Sea HD-Series On/Off Battery Switch is designed to provide a clear, manual battery disconnect point—helping reduce the risk of accidental drain during storage, improving serviceability, and supporting safer fault isolation when working on DC electrical systems.
This single-circuit battery switch is commonly used as a main battery switch or a dedicated disconnect for a load group such as a windlass, inverter, or distribution panel. Turning power off at the source can help limit the impact of unexpected faults and makes it easier to perform routine checks without live circuits in the background.
Built for harsh environments and high-current demand
Marine and mobile electrical installs face vibration, heat, and moisture—conditions that can expose weak points in a system. The HD-Series construction is engineered for demanding use and is ignition protected, making it suitable for installation aboard petrol-powered boats where compliance and safety considerations matter.
For Australian conditions—whether you’re dealing with coastal salt air, long-distance touring, or high accessory loads—this switch provides a robust, purpose-built solution that helps keep power control straightforward and dependable.
Flexible mounting for clean installs
Neat access and correct mounting are important for day-to-day usability. The case design supports surface or rear panel mounting, allowing you to position the switch where it’s accessible for quick isolation, yet protected from accidental operation. This flexibility suits a wide range of fit-outs, from centre-console boats and yachts to canopy systems and camper builds.
Key features
- On/Off battery disconnect for a single battery to a single load group
- Ignition protected design suitable for petrol-powered marine applications
- High-current HD-Series performance for demanding DC systems
- Surface or rear panel mounting options for tidy installations
- Accepts dual heavy-gauge battery cables for robust connections
Where this switch fits best
This switch is well suited to applications where you want a dedicated, manual disconnect point, including:
- Marine battery isolation for house or start batteries
- Caravan and camper DC systems needing a master shut-off
- 4WD dual-battery setups where service isolation is required
- Off-grid DC systems where controlled shutdown improves maintenance safety
What it helps you prevent
A quality battery switch on/off can help reduce avoidable issues such as parasitic battery drain during storage, accidental short circuits while servicing, and the confusion of not knowing which circuits are live. By adding a clearly marked isolation point, you improve troubleshooting speed and make emergency shutdown more straightforward.
Trusted choice for installers and DIY builds
Blue Sea Systems components are widely specified in marine electrical work due to their practical design and application focus. If you’re searching for a Blue Sea battery switch, 600A battery isolator, or a heavy-duty battery disconnect switch to suit marine and mobile power, this HD-Series model is a proven option for high-current DC installations.
SPECIFICATIONS
Specifications
| Switch Type | Single Circuit ON-OFF |
|---|---|
| Color | Grey |
| Switch Positions | 2 |
| Battery Combine | No |
| Alternator Field Disconnect | No |
| Maximum Voltage | 32V DC |
| Terminal Stud Torque |
220 in-lb (24.86 N·m) (approx. 18.3 ft-lb; reference only) |
| Continuous Rating | 500A |
| Intermittent Rating | 900A (5 min) |
| Starting Rating (30 sec) | 1750A |
| Battery Inputs | 1 |
| Cable Clearance For 4/0 AWG Cables |
1.10in (27.94 mm) (reference only) |
| Cable Quantity to Meet Ratings | Two Cables |
| Cable Size to Meet Ratings |
4/0 AWG (120mm²) (AWG vs mm² is an approximate equivalence; reference only) |
| Mounting Holes |
Accept 1/4" (M6) Screw (1/4" ≈ 6.35 mm; M6 is 6 mm; reference only) |
| Switching Rating | 25A |
| Terminal Stud Size |
1/2" (M12) (1/2" ≈ 12.70 mm; M12 is 12 mm; reference only) |
| Weight (min / max) |
1.30–1.30 lb (0.59–0.59 kg) (approx. 590 g; reference only) |
| SKU: | BS-3000B |
| Barcode: | 632085030001 |
| Model #: | BS-3000B |
| MPN: | BS-3000B |
