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Five cylindrical glass fuses with metal end caps

Bussmann

Bussmann GMC-63-R Glass Fuse 63mA 250V AC 5 PK

SKU CH-6AH7-MHR1A

Pack of five 20 mm glass time-delay fuses rated 63 mA at 250 V AC with 10 kA interrupt at 125 V AC

  • Time-delay protection handles temporary surges
  • 63 mA rating suits low-current circuits
  • 250 V AC rating fits mains-voltage equipment
  • 10 kA interrupt rating at 125 V AC clears high faults
  • Pack of five fuses keeps spares on hand

What this fuse protects

The EATON BUSSMANN GMC-63-R is a cylindrical glass fuse rated at 63 mA and 250 V AC. It suits equipment that needs a time-delay element to tolerate brief inrush currents without nuisance opening. The five-piece pack gives spares for maintenance or multiple circuits.

Interrupt rating decides fit

At 125 V AC the fuse interrupts 10 kA, while at 250 V AC it interrupts 35 A. Choose this part only when the prospective short-circuit current in your application stays within those limits. The non-rejection body fits standard HTB fuse blocks and matches Littelfuse 239 and Mersen GSC equivalents.

Thermal behaviour in service

The time-delay characteristic lets the element absorb temporary overloads without opening, reducing thermal cycling stress. The glass body provides visible indication of a blown element. No forced cooling or special ventilation is required for normal operation at the rated current.

How it compares

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

Price $13.99
Cheaper than about 88% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameEATON BUSSMANN

Questions about this item

How does the 63 mA rating protect a circuit once the fuse is installed?

The fuse carries up to 63 mA continuously and opens after a time-delay when current exceeds that level, interrupting fault current up to 10 kA at 125 V AC or 35 A at 250 V AC.

What does the 10 kA at 125 V AC and 35 A at 250 V AC interrupt rating limit in practice?

It defines the maximum prospective short-circuit current the fuse can safely break at each voltage; above those levels the fuse may not clear the fault reliably.

What physical dimensions and mounting style does the 20 mm × 5 mm cylindrical glass body require?

It fits standard 5 mm × 20 mm fuse clips or holders such as the HTB series; the glass cylinder simply pushes into the clips without a rejection feature.

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