Blue Sea 5243 Fuse ATO/ATC 20 Amp 2/Pk
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You have 30 days to request a return. All sale items are final sale.
Blue Sea 5243 ATO/ATC fuses (20 Amp) deliver fast-acting circuit protection with corrosion-resistant tin-plated connector blades and clear blown-fuse indication—sold as a 2-pack for convenient spares.
Key Features
- Fast-acting ATO/ATC blade-style fuse for DC circuit protection
- Tin-plated connector blades help resist corrosion at the fuse contacts
- Visible blown-fuse indication for quick troubleshooting
- Maximum voltage: 32 volts DC
- Interrupt capacity: 1000 amperes DC
Intended Use
- Marine and RV DC electrical circuits requiring ATO/ATC fuse protection
- Systems using ATO/ATC style plug-in blade fuses for panel or holder installs
Product Details
- Brand/Series: Blue Sea Systems
- Part number/SKU: 5243 (SKU shown: 661-5243)
- Fuse type: ATO/ATC
- Amperage rating: 20 Amp
- Package quantity: 2 per pack
- Maximum voltage: 32 volts DC
- Interrupt capacity: 1000 amperes DC
Parts Desk Insights
Best Use Case: Ideal for replacing like-for-like ATO/ATC fuses in DC panels or fuse holders where you want clear blown-fuse identification and fast-acting protection.
Common Issues: If a fuse repeatedly blows, avoid simply upsizing—inspect the connected load, wiring, and termination points for shorts or overloads. Also verify the correct ATO/ATC fuse size/type matches the holder.
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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.