The Jandorf GMA 4A Fast Acting Fuse (2-pack) is a compact, high-reliability overcurrent protector designed to safeguard electronic circuits with rapid response to surge conditions. Built for precision and visibility, this 4-amp fuse helps protect power supplies, control boards, and small electronics from damaging spikes.
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Current rating: 4 A
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Voltage rating: 125 V
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Type: Fast acting fuse
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Tube construction: Glass
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Endcap construction: Plated brass
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Size: 5 mm diameter × 20 mm length (5x20mm)
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Packaging: Carded, 2 fuses per pack
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Brand & series: Jandorf, GMA
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Safety listings: UL Listed, CSA Listed
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Tamper resistance: Non-tamper-proof
Designed for quick protection in electronic circuits, these 5x20mm fast-acting fuses are ideal for power supplies, embedded controllers, audio/video equipment, and hobbyist projects where a fast disconnect is essential to prevent component damage. The glass tube provides clear visibility for fuse status during diagnostics, making it easier to verify whether the fuse has opened after a fault. Why choose the Jandorf GMA 4A fast-acting fuse?
- Precision protection: The fast-acting design interrupts current immediately on a surge, reducing the risk to delicate components in sensitive electronics.
- Reliable construction: Glass tube with plated brass endcaps delivers durable, corrosion-resistant contact points and dependable reliability over long-term use.
- Verified safety: UL and CSA listings give you confidence in conformity and performance for both professional builds and consumer electronics.
- User-friendly packaging: A compact 2-pack on a carded package makes stocking and replacement straightforward for field service, repair work, or DIY projects. Use cases and practical tips
- Replace blown fuses in 5x20mm fuse holders or fuse blocks that require a 4A, 125V protective device.
- Suitable for hobby projects, educational kits, and small power adapters where quick interruption is critical.
- When selecting a replacement, ensure your circuit’s continuous operating current stays safely below 4A to avoid nuisance blows, and verify that the 125V rating matches your system’s supply voltage.
- For troubleshooting, inspect the glass tube for a broken filament to confirm a blown fuse, and replace with the same 4A fast-acting rating to restore operation safely. The Jandorf GMA 4A Fast Acting Fuse (2-pack) delivers precise, rapid overcurrent protection with robust safety certifications, clear status visibility, and practical, project-ready packaging. It’s the smart choice for reliable protection in electronic circuits where speed and accuracy matter.
