Engineered for dependable circuit protection, the Jandorf GMC 4 amps Medium Time Delay Fuse is a compact 5x20mm glass-tube device designed to handle inrush without nuisance trips. Sold as a 2-pack in a carded package, it’s ready for fast replacement in electronics projects and professional setups.
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Type: Medium Time Delay (slow-blow) fuse
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Current rating: 4 A
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Voltage rating: 125 V
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Body: Glass tube with plated brass endcaps
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Dimensions: 5 mm diameter x 20 mm length (5x20mm)
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Package: 2 pieces in a carded pack
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Listings: UL Listed, CSA Listed
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Tamper resistance: Not tamper-proof
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Brand: Jandorf GMC (GMC sub-brand)
Ideal applications and use cases
Designed for electronic circuits that experience brief startup surges, the Jandorf GMC 4A Medium Time Delay Fuse protects power supplies, control boards, small motors, transformers, LED drivers, and consumer electronics without sacrificing performance. The slow-blow action accommodates inrush currents common in fans, relays, and power adapters, reducing nuisance blows while still delivering robust protection when faults occur.
Why this fuse stands out
Compared with fast-acting alternatives, the GMC fuse’s medium time delay profile minimizes unnecessary interruptions during normal startup, making it a reliable choice for equipment that occasionally demands a surge. The glass body provides clear visibility of fuse integrity, and the plated brass endcaps ensure dependable conductivity and longevity in standard 5x20mm fuse holders. UL and CSA listings add confidence for both DIY projects and professional installations.
Practical installation and tips
- Match the fuse to a 5x20mm holder and replace with the same 4 A, medium time delay rating.
- Use in circuits rated for 125V AC; ensure power is disconnected before replacement.
- Store the 2-pack in a dry, organized workspace to prevent confusion with other ratings.
- If tamper resistance is required, consider opting for a fuse with built-in tamper protection or additional enclosure.
