Blue Sea Systems 4A ATO/ATC Blade Fuse – BSS-5238
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
4A ATO/ATC Blade Fuse for Marine DC Circuits
Precision overcurrent protection for your most sensitive onboard electronics. This 4-amp ATO/ATC blade fuse is designed for low-draw marine DC circuits where accurate, fast-blow protection is critical. The standard ATO/ATC form factor fits any blade fuse holder or fuse block, making it a straightforward replacement for a wide range of panel and inline applications.
Fast-blow design trips immediately under overload conditions, protecting delicate electronics and wiring before damage can occur.
Specifications
- Amperage Rating: 4A
- Type: ATO/ATC blade fuse (fast-blow)
- Application: Marine DC circuit protection
- Part Number: BSS-5238
- SKU: BSS-5238
Best Use Cases
- Protecting sensitive electronics such as GPS units, AIS transponders, and instrument displays
- Low-draw accessory circuits including alarms, sensors, and indicator lights
- Replacement fuse for any standard ATO/ATC blade fuse holder
- Stocking spares for onboard fuse panels and distribution blocks
Parts Desk Insights
The 4A fuse sits right at the edge of the ultra-low-draw range — ideal for AIS transponders, GPS receivers, and other precision electronics that need tight overcurrent protection. For a clean multi-circuit install, pair with the ATO/ATC Fuse Block 6 Circuit with Ground – BSS-5025 or the Split Bus Fuse Block 12-Circuit – BSS-5032. For exposed or bilge-adjacent runs, the Waterproof Fuse Holder ATO/ATC – BSS-5065 keeps moisture out. For other amperage ratings in this family, see the 5A (BSS-5239), 25A (BSS-5244), or 1A (BSS-5235).
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.