Blue Sea Systems 3002 HD-Series Heavy Duty 4 Position Selector Battery Switch
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Up to 500A continuous rating for large diesel engines. One-piece tin-plated copper stud design never loosens over time. Terminal studs accept 1/2" or M12 ring terminals. Ignition protected and UL Listed. Selector features make-before-break contact design. AFD ( Alternator Field Disconnect models allow switching while running the engine without damaging the alternator.
- Cranking Rating 30 sec.: 1600A DC
- Cranking Rating 1 min.: 1150A
- Intermittent Rating 5 min.: 700A
- Continuous Rating: 500A
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 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.