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Description
Blue Sea E-series Battery Switch On-off With AfdBlue Sea Systems e Series On Off Battery Switch with AFD Model: 9004E BSS 350 Amps continuous rating for inboard gasoline or diesel engines. Tin plated copper studs for maximum conductivity and corrosion resistance Accepts up to 4 0 AWG battery cables Studs accepts 3 8"" (M10) ring terminals 7 8"" (22mm) stud length accepts multiple cable terminals Blue Sea Systems one piece terminal stud design never loosens over time Fits most Perko and Guest low
Blue Sea Systems e-Series On-Off Battery Switch with AFD
Model: 9004E-BSS- 350 Amps continuous rating for inboard gasoline or diesel engines.
- Tin-plated copper studs for maximum conductivity and corrosion resistance
- Accepts up to 4/0 AWG battery cables
- Studs accepts 3/8"" (M10) ring terminals
- 7/8"" (22mm) stud length accepts multiple cable terminals
- Blue Sea Systems one-piece terminal stud design never loosens over time
- Fits most Perko and Guest low amperage battery switch hole patterns
- Case design allows surface or rear panel mounting
- Tactile indicator conveys knob position by feel
- Waterproof — rated IP66 from water projected in powerful jets
- Ignition protected—safe for installation aboard gasoline powered boats
- Includes AFD (Alternator Field Disconnect)
Switches a single battery to a single load group
Specifications| Switch Type | Single Circuit ON-OFF |
| Color | Red |
| Switch Positions | 2 |
| Battery Combine | No |
| Alternator Field Disconnect | Yes |
| Maximum Voltage | 48V DC |
| Terminal Stud Torque | 140 in-lb (15.82 Nm) |
| Continuous Rating | 350A |
| Intermittent Rating | 600A (5 min) |
| Cranking Rating 30 sec | 1200A per circuit |
| Battery Inputs | 1 |
| Cable Clearance For 4/0 AWG Cables | 1.10in (27.94 mm) |
| Cable Size to Meet Ratings | 4/0 AWG (120mm ) |
| Mounting Holes | Accept 1/4"" (M6) Screw |
| Stud Material | Tinned Copper |
| Terminal Stud Size | 3/8"" - 16 (M10) |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 29 reviews
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Product Reviews
★★★★★ 4
Wire length between the two connectors is short for a full-size pickup
Size: 16AWG Wiring Harness-2 Leads
I used the harness to wire ditch lights on opposite sides of a full-size pickup (F150). The wire between the 2 2-pin connectors was about 18 inches too short. Fortunately, splicing the wires from the (Nilight) ditch lights and the included pigtails gave barely enough length to reach the connectors. The connectors are buried inside the trim channel for the cowl; I'd have preferred they were exposed on each side to allow for easy swapping of the lights, but I can live with it. There is more than enough wire from the first connector to the relay for my all-under-hood installation, but I didn't think to measure if it would reach into the truck bed. The harness is of good quality and is a very good value. It would be a 5-star if it weren't for that little length issue.
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Reviewed in the United States on June 1, 2025
★★★★★ 5
great value
Size: 16AWG Wiring Harness-2 Leads
very affordable light install kit. worth the price just in the wiring connectors. I used this with my Nilight front bumper kit. i bypassed the button and wired high beam (+) to the yellow small wire. I did this so when the highbeams come on the light bar comes on. because with the stock arragement of this harness, the button continously draws power for the indicator LED
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Reviewed in the United States on April 30, 2026
★★★★★ 5
The Easiest!
Size: 16AWG Wiring Harness-2 Leads
This is one of the best and easiest wiring system to install that I have every used. And the price is great!
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Reviewed in the United States on June 11, 2025
★★★★★ 5
Well done. Useful.
Size: 16AWG Wiring Harness-2 Leads
Always well done.
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Reviewed in the United States on August 24, 2025
★★★★★ 5
Muy bueno gracias
Size: 16AWG Wiring Harness-2 Leads
Excelente
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Reviewed in the United States on January 27, 2026
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