Blue Sea Systems Panel Mount AGC/MDL Fuse Holder, Waterproof
Waterproof panel-mount fuse holder for AGC/MDL glass fuses, up to 20A
SKU BLUE-5021B
Panel-mount AGC/MDL fuse holder, 20A max, waterproof knob design. Withstands salt spray, rain, and momentary immersion. Fuse sold separately.
- Maximum Amperage
- 20A
- Mounting Hole Diameter
- 0.50in (12.7 mm)
- Weight
- 0.02 lb
- Amperage
- 20A
- Ip Rating
- Waterproof (spray, rain, momentary immersion)
- Manufacturer
- Blue Sea Systems
- Mounting Style
- Panel mount, 0.50in hole
Stocked items typically ship the next business day from our US warehouse. 30-day returns on unused stocked items. Exclusions apply. Return policy · Shipping policy
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About this product
Blue Sea Systems Panel Mount AGC/MDL Fuse Holder, waterproof, 20A max, 0.50in mounting hole. Manufacturer PN 5021.
The Blue Sea Systems Panel Mount AGC/MDL Fuse Holder is a small waterproof holder for AGC or MDL glass fuses, built to the same design used in Blue Sea's Contura waterproof switch panels. Its knob-style cap withstands the water exposure typical of above-deck installations — salt spray, rain, hose washdowns, and momentary immersion.
Key features
- 20A maximum
- Waterproof design suitable for above-deck, exposed installations
- Easy-open knob for fast fuse access
- 0.50" mounting hole; replaces the fuse holder found in Contura waterproof fuse panels
It accepts any AGC or MDL glass fuse (sold separately), and Blue Sea's 5- or 41-piece AGC fuse kits (PN 5288, 5289) are a convenient way to keep a range of amperages on hand. The replacement cap for this holder is sold separately as PN 5022 if the original ever cracks or is lost.
Because it's rated to 20A only, this holder suits small accessory circuits — instrument lighting, bilge alarms, and similar low-draw loads — rather than main or branch power distribution.
Product details
- Maximum Amperage
- 20A
- Mounting Hole Diameter
- 0.50in (12.7 mm)
- Weight
- 0.02 lb
- Amperage
- 20A
- Ip Rating
- Waterproof (spray, rain, momentary immersion)
- Manufacturer
- Blue Sea Systems
- Mounting Style
- Panel mount, 0.50in hole
Shipping & returns
- Stocked items typically ship the next business day from our US warehouse.
- 30-day returns on unused stocked items. Exclusions apply. See policy
- Custom and quoted items are non-returnable once production begins.
Warranty
Backed by the original manufacturer’s warranty plus our workmanship guarantee on assembled harnesses. Contact us with your invoice and we’ll coordinate any covered repair or replacement.
Read the full warranty termsTechnical support
Need help choosing the right part?
Our marine electrical team can review your setup and recommend compatible products. Send a photo, a sketch, or your circuit list and we'll come back with a parts list that fits the boat.
Certifications & training
- ABYC-aware build practices
- OEM-grade marine wire & terminals
Additional capabilities are based on hands-on experience building marine wiring systems rather than third-party certification.
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Why buy from Common Ground Marine
- 20+ years building marine wiring harnesses, panels, and shore-power systems.
- Engineers — not a phone tree — review every custom build before parts are cut.
- OEM-grade components: tinned copper, sealed connectors, marine-rated jackets.