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Cylindrical glass fuse with metal end caps

Bussmann

Bussmann GMQ-6-1/4 Time-Delay Glass Fuse 6.25A 300V AC 10kA

SKU CH-HH0D-VAPTF

Time-delay glass fuse rated 6.25 A at 300 V AC with a 10 kA interrupt rating

  • Time-delay characteristic prevents nuisance trips from inrush currents
  • 25 A rating protects circuits at 300 V AC
  • 10 kA interrupt rating handles high fault currents safely
  • Glass body allows visual inspection of element status
  • UL 248-14, CSA and CE certifications confirm compliance

What this fuse protects

The Bussmann GMQ-6-1/4 is a time-delay glass fuse rated for 6.25 amps at 300 volts AC. It suits circuits that experience brief inrush currents and need a fuse that tolerates momentary surges without opening. Buyers who want a fast-acting fuse for sensitive electronics should choose a different type.

The rating that decides fit

The interrupt rating is 10 kiloamps at 300 volts AC. This single figure tells you whether the fuse can safely clear a fault on your supply. If your available fault current exceeds that level, this fuse is not adequate. The cylindrical body measures 2-1/4 inches long by 5/8 inch diameter and fits compatible HLQ series fuse blocks.

Installing and common mistakes

The fuse inserts into a matching HLQ fuse block; no tools are required beyond the block's own mounting hardware. A frequent error is forcing the fuse into a block with a different rejection feature, which can damage the glass body. Verify the cap diameter matches 5/8 inch before installation. Always replace with the same series and rating.

How it compares

Measured against everything we stock in Breakers & Circuit Protection, at today’s prices. Recalculated every night.

Price $8.99
Cheaper than about 94% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameEATON BUSSMANN

Questions about this item

How does the 10 kA interrupt rating protect my circuit in a real installation?

It guarantees the fuse can clear a short-circuit current of up to 10 000 amps at 300 V AC without rupturing.

What does the 300 V AC rating cap for this GMQ fuse?

It limits use to circuits where the nominal voltage does not exceed 300 V AC.

What fuse block or holder does the 2-1/4 in by 5/8 in cylindrical body need?

It fits the HLQ series fuse blocks that accept this diameter and length.

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