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Five cylindrical glass fuses with metal end caps

Eaton Bussmann

Eaton Bussmann GMA-4-R Glass Fuse 4A 125V 10kA 5 PK

SKU CH-17KW-7DPWT

Pack of five 4 A glass tube fuses rated 125 V AC with 10 kA interrupt capacity

  • Fast-acting protection clears faults quickly
  • 10 kA interrupt rating handles high fault currents
  • 4 A at 125 V AC suits low-voltage circuits
  • Glass cylindrical body fits standard 20 mm × 5 mm holders
  • Pack of 5 fuses provides ready spares

Glass fuse for low-voltage circuits

This pack contains five Eaton Bussmann GMA series glass fuses rated at 4 A and 125 V AC. They suit equipment that requires a fast-acting, single-element fuse in a 20 mm by 5 mm cylindrical body. The non-rejection style fits compatible HTB series fuse blocks without a keyed holder.

Glass body and cylindrical mounting

The glass tube lets you inspect the element visually after a fault. A 10 kA interrupt rating at 125 V AC means the fuse can clear high short-circuit currents safely. The 20 mm length and 5 mm diameter match the standard GMA form factor used in many panel-mounted fuse blocks.

Check voltage and holder compatibility

Verify that your circuit operates at or below 125 V AC and that the fuse block accepts a non-rejection 5 mm diameter fuse. Confirm the 4 A rating matches the protection requirement of the load. The pack provides five pieces for spares or multiple circuits.

How it compares

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Price $5.99
Cheaper than about 97% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameEATON BUSSMANN

Questions about this item

What does the 10kA interrupt rating at 125V AC mean for this fuse?

It means the fuse can safely break a fault current up to 10kA at 125V AC without rupturing, protecting the circuit during a severe short circuit.

What are the physical dimensions needed for a holder to accept this GMA fuse?

The fuse body is 20 mm long and 5 mm in diameter, matching the standard 5×20 mm cylindrical size used in compatible HTB series fuse blocks.

How do you install these fast-acting glass fuses, and what common mistake should be avoided?

Insert each fuse into a suitable 5×20 mm holder until fully seated; do not solder directly to the glass body or use a holder rated below 125V AC and 10kA interrupt capacity.

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