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Clear glass tube fuse with silver metal end caps, fifty pieces in a pile

Unique-Bargains

Unique-Bargains 250V 0.5A 5x20mm Fast Blow Glass Tube Fuse 50pcs

SKU CH-ZT3D-Q10GR

Pack of 50 fast-blow glass tube fuses rated 250V 0.5A, measuring 5 x 20mm for electrical equipment protection

  • Fast blow action protects circuits quickly
  • 250 V rating suits many low-voltage devices
  • 5 A current limit guards sensitive equipment
  • Standard 5 x 20 mm glass tube fits common holders
  • Pack of 50 fuses keeps spares on hand

What this product is

This pack contains fifty 5 × 20 mm glass tube fuses rated at 250 V and 0.5 A. They are fast-blow devices designed to interrupt over-current quickly in low-power circuits. The fuses are supplied new and suit repair or maintenance work on compatible electrical equipment.

How it fits into a build

Each fuse occupies a standard 5 mm by 20 mm holder, so the host device must provide matching clips or a PCB footprint. The glass body allows visual inspection of the element after a fault. The pack quantity frees the user from sourcing individual replacements for recurring service tasks.

Behaviour under sustained load

Fast-blow construction means the element opens rapidly once current exceeds the 0.5 A rating, limiting energy let-through during a fault. The low breaking capacity suits circuits where prospective short-circuit current remains modest. Continuous operation at or near rated current will not cause nuisance opening if the circuit stays within design limits.

How it compares

Measured against everything we stock in Fuses & Fuse Blocks, at today’s prices. Recalculated every night.

Price $5.99
Cheaper than about 80% of the 109 comparable items (median $14.99).

Specifications

Product
Brand nameUnique Bargains

Questions about this item

Will the .5 A rating hold continuously or does the fast-blow design open on brief inrush?

The fast-blow glass tube is rated at .5 A and 250 V; it will interrupt quickly on overcurrent rather than tolerate sustained overloads.

Do these 5 x 20 mm fuses generate noticeable heat when run all day at rated load?

At .5 A the dissipation is small; the glass and metal construction stays cool enough for continuous operation inside equipment.

What holder or clip do I need to install a 5 x 20 mm glass fuse?

A standard 5 x 20 mm fuse holder or PCB clip accepts the .19 in diameter by .78 in length tube supplied in the 50-piece pack.

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