Blue Sea 5243100 Fuse ATO/ATC 20 Amp 25/Pk
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You have 30 days to request a return. All sale items are final sale.
Blue Sea 5243100 is a 20 Amp ATO/ATC fast-acting fuse pack (25). Built for low-voltage DC protection with tin-plated connector blades for corrosion resistance and a visible indication of a blown fuse.
Key Features
- Fast-acting ATO/ATC fuse for low-voltage DC circuit protection
- Tin-plated connector blades help resist corrosion
- Visible indication of a blown condition for faster troubleshooting
- Maximum voltage rating: 32 volts DC
- Interrupt capacity: 1000 Amperes DC
Intended Use
- DC electrical systems using ATO/ATC-style mini blade fuses
- Marine and RV DC circuit protection applications (via compatible ATO/ATC fuse holders)
- Accessory wiring that uses fast-acting ATO/ATC blade fuses and requires blown-fuse visibility
Product Details
- • Product: Blue Sea 5243100 Fuse ATO/ATC 20 Amp 25/Pk
- • Fuse type: ATO/ATC
- • Amperage rating: 20 Amp
- • Pack count: 25 fuses per pack
- • Maximum voltage: 32 volts DC
- • Interrupt capacity: 1000 Amperes DC
- • SKU: 661-5243100
- • Variant barcode note: Barcode provided on the variant was in scientific notation, so it is omitted from customer-facing copy.
Parts Desk Insights
Best Use Case: Ideal for replacing or stocking ATO/ATC blade fuses in DC fuse panels or compatible fuse holders where you want fast-acting protection and quick visual confirmation when a fuse has blown.
Common Issues: If a fuse blows repeatedly, the likely cause is an overcurrent condition or a downstream short/overload—verify the wiring and load before installing a replacement. Always match the required amperage and confirm the fuse holder is designed for ATO/ATC blade fuses.
Related Products & Accessories
- Browse Fuse Holders & Switches/Circuit Protection - Pair this fuse pack with the correct ATO/ATC-compatible fuse holder used in your installation.
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.