Blue Sea Systems 3002 HD-Series Heavy Duty 4 Position Selector Battery Switch
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You have 30 days to request a return. All sale items are final sale.
Overview
Blue Sea Systems 3002 HD-Series Heavy Duty 4 Position Selector Battery Switch
Key Features
- 4-Position HD-Series selector battery switch
- Up to 500A continuous rating
- One-piece tin-plated copper stud design (robust, never loosens)
- Terminal studs accept 1/2" or M12 ring terminals
- Ignition protected and UL Listed
- Make-before-break contact design
- AFD (Alternator Field Disconnect) models allow switching while running without damaging the alternator
Compatible Applications
- Marine electrical systems
- Heavy-duty DC electrical systems for engines
- Industrial equipment and large diesel engines
- Battery switching for large power systems
Product Details
- SKU: 661-3002
- 4-Position Selector
- Continuous rating: 500A
- Cranking rating (30 s): 1600A DC
- Cranking rating (1 min): 1150A
- Intermittent rating (5 min): 700A
- Weight: 590 g
- Barcode: 6.32085E+11
- Terminal studs: tin-plated copper
- Terminal terminals: accepts 1/2" or M12 ring terminals
- Construction: one-piece tin-plated copper stud design
- Ignition protected and UL Listed
- Contact design: Make-before-Break
- AFD models: allow switching while running without damaging the alternator
- Up to 500A continuous rating for large diesel engines
Parts Desk Insights
Best Use Case: Best for high-current battery switching in large diesel-engine systems, including marine and industrial applications. AFD models permit switching while engine runs to protect the alternator.
Common Issues: Verify terminal compatibility (1/2" or M12 ring terminals) and correct wiring for make-before-break switching to prevent misconnection.
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Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.