The Jandorf S501 2.5A Fast Acting Fuse is a compact, high-reliability protection device designed for electronic circuits. This two-pack delivers quick interruption of current to shield sensitive components from short-circuit damage, all in a rugged ceramic tube built to tolerate heat and compact layouts.
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Amperage: 2.5 A
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Voltage rating: 250 V
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Type: Fast Acting Fuse
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Tube construction: Ceramic
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Endcap construction: Plated brass
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Diameter x Length: 5 mm x 20 mm (5x20mm standard form factor)
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Packaging: Carded
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Quantity: 2 fuses per pack
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UL Listed: Yes
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CSA Listed: No
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Brand / Sub Brand: Jandorf / S501
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Tamper Proof: No
Why this fuse stands out
Designed specifically for electronic circuits that demand fast response, the S501 fuse instantly clears overcurrent without sacrificing reliability. The ceramic tube provides superior heat resistance in compact enclosures, helping maintain performance in densely packed power supplies and control boards. Plated brass endcaps ensure solid, repeatable contact, reducing connection resistance and arcing in mission-critical applications.
Ideal use cases
- Power supplies, adapters, and LED drivers where quick fault isolation protects downstream components.
- Compact electronics assemblies and boards that require the durable form factor of a 5x20mm fuse.
- Repair work and field stocking—this two-pack gives you ready spares for common 2.5A, 250V protection needs.
Practical guidance
To maximize safety and performance, replace blown fuses with the same rating (2.5 A, 250 V) and the same fast-acting characteristic. The two-pack packaging is ideal for technicians and hobbyists who balance efficiency with reliability in ongoing electronics projects. If your design calls for rapid current interruption in sensitive circuitry, the Jandorf S501 is a dependable, standards-supported choice.
