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Five cylindrical glass fuses with silver end caps

Bussmann

Bussmann GMC-250-R Glass Fuse 250mA 250V AC 5 pack

SKU CH-3YKM-KEBYZ

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

  • Time-delay protection prevents nuisance trips
  • 250 mA rating suits low-current circuits
  • 250 V AC rating covers mains applications
  • 10 kA interrupt at 125 V AC handles high fault currents
  • Pack of five provides ready spares

Glass Fuse for Low-Current Protection

The Bussmann GMC-250-R is a glass-bodied fuse rated at 250 mA and 250 V AC. It suits circuits that need a small, time-delay element to tolerate brief inrush without nuisance opening. The pack contains five cylindrical fuses measuring 20 mm long by 5 mm diameter. Engineers and hobbyists use them in instrumentation, power supplies and control boards where a non-rejection style fits the holder.

Interrupt Ratings Define Safe Application

The fuse carries a 10 kA interrupt rating at 125 V AC and a 35 A rating at the full 250 V AC. Those figures are the practical limits: the device must not be used on circuits where prospective short-circuit current exceeds the applicable value. It complies with UL 248-14 Guide JDYX, CSA Class 1422-01 and CE standards. The GMC series cross-references Littelfuse 239 and Mersen GSC equivalents for sourcing flexibility.

Straightforward Holder Installation

Installation consists of pressing each fuse into a compatible HTB-series fuse block or any 5 mm x 20 mm clip. The glass body lets you verify element status visually after a fault. The common mistake is selecting a fast-acting fuse when the circuit needs the time-delay characteristic, or exceeding the 35 A interrupt limit at 250 V AC. Always confirm the holder matches the non-rejection body style before fitting.

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Price $17.99
Cheaper than about 82% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameEATON BUSSMANN

Questions about this item

Should I choose the 250 mA version or a different current rating for my circuit?

Select the 250 mA fuse only if your circuit requires exactly that current rating; a different rating will not protect the equipment correctly.

What does the 10 kA at 125 V AC interrupt rating mean once the fuse is installed?

It means the fuse can safely break a fault current of up to 10 000 amps at 125 V AC without rupturing the glass body.

How does the 35 A at 250 V AC rating limit what this fuse can handle?

At 250 V AC the fuse is only rated to interrupt 35 amps, so it must not be used on circuits where a higher fault current could occur.

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