Blue Sea Systems 9002e e-Series 4 Position Selector Battery Switch With Alternator Field Disconnect
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You have 30 days to request a return. All sale items are final sale.
Overview
<p>9002e e-Series 4 Position Selector Battery Switch With Alternator Field Disconnect</p><p>High-current battery switch designed for inboard engines and marine electrical systems requiring reliable, field-disconnect capable switching.</p>
Key Features
- 4-position selector battery switch
- 350 A continuous rating for inboard gasoline and diesel engines
- Make-before-break contact design
- One-piece tin-plated copper stud design that won’t loosen over time
- Terminal studs accept 3/8" or M10 ring terminals
- Ignition protected and UL Listed
- AFD = Alternator Field Disconnect model; allows switching while running without damaging the alternator
- Color: Red
Compatible Applications
- Inboard gasoline and diesel marine engines
- Marine electrical systems that require high-current battery switching
- Applications requiring Alternator Field Disconnect (AFD) capability
Product Details
- SKU: 661-9002E
- Weight: 431 grams
- Amp rating: 350 A continuous
- Color: Red
- 4-position selector
- Construction: One-piece tin-plated copper stud design
- Terminal studs: Accept 3/8" or M10 ring terminals
- Protection: Ignition protected and UL Listed
- Contact: Make-before-break
- AFD: Alternator Field Disconnect model (allows switching while running without damaging the alternator)
Parts Desk Insights
Best Use Case: Ideal for marine inboard engines that need a high-current battery switch with the ability to disconnect the alternator field while the engine is running.
Common Issues: Make-before-break operation requires correct sequencing of connections; verify ring-terminal sizing; ensure wiring gauge and insulation are appropriate; verify compatibility with your alternator and battery setup.
Related Products & Accessories
- Battery Switches - Browse related battery switches
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.