Meet the Jandorf GMC 500A Medium Time Delay Fuse, a purpose-built protection device designed for high-current circuits that experience brief inrush. This 2-pack delivers reliable overcurrent protection at 500 amps and 250 volts, making it a ready-to-use solution for demanding equipment and power systems. Crafted with a glass tube and plated brass endcaps, these fuses combine visible status at a glance with sturdy construction for everyday industrial use.
Key specifications at a glance
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Current rating: 500 A
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Voltage rating: 250 V
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Time delay: Medium Time Delay (MTD) — balances rapid response with tolerance for brief surges
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Construction: Glass tube with plated brass endcaps
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Size: 5 mm diameter x 20 mm length
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Package: 2 fuses per carded package
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Listings: UL Listed, CSA Listed
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Tamper proof: No
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Brand/Sub-brand: Jandorf GMC
This medium time-delay fuse is ideal for circuits where a pure fast blow would cause nuisance trips during startup, but a quick, uncontrolled surge could damage components. The 500 A rating suits heavy-duty equipment, motor drives, large power supplies, welding gear, and industrial control panels that require solid protection against short circuits and overloads without sacrificing inrush performance.
Why this fuse stands out
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High-current reliability: 500 A rating provides robust protection for demanding equipment, reducing risk during fault conditions.
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Inrush-friendly design: Medium Time Delay handles brief surges common in motors and power supplies, lowering nuisance trips while safeguarding components.
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Visible integrity: A glass tube lets technicians quickly inspect the fuse element and confirm a clean break when it has operated.
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Certified safety: UL and CSA listings ensure compliance with established electrical safety standards.
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Durable build for panels and enclosures: Brass endcaps and a compact 5 × 20 mm footprint fit neatly into control panels, junction boxes, and modular fuse holders.
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Convenient 2-pack: Keep spares on hand for quick swaps, minimizing downtime during maintenance or upgrades.
Ideal use cases
- Protect motor controllers, drives, and large power supplies where startup inrush is common
- Guard industrial control panels and electrical cabinets against short circuits
- Support high-current circuits in HVAC equipment, welding setups, and heavy equipment power circuits
- Replace worn fuses in service panels where GMC-series protection is standard
Practical tips for installation and maintenance
- Always verify the circuit’s operating current and the equipment’s recommended fuse rating before installation.
- Use in enclosures or fuse holders that accommodate 5 mm × 20 mm glass-tube fuses to ensure proper seating and contact.
- In maintenance, perform a visual check when the fuse has tripped—a clean break generally indicates a fault, while a partially melted element may warrant full replacement.
- Keep the two-pack stocked for quick replacements during routine service or panel upgrades, reducing downtime.
