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The COOPER BUSSMANN BP/GMA-3A is a fast-acting glass fuse rated at 3 amps and 250 volts, designed for electronic circuit protection. Measuring 5mm x 20mm, this Type GMA fuse is a standard form factor widely used in low-current electronic equipment. The fast-acting response provides immediate overcurrent interruption, protecting sensitive components from damage caused by sustained fault current. This carded 2-pack is suited for service technicians who need replacement fuses on hand during field work or bench repair of electronic control boards and similar equipment.
The BP/GMA-3A is used in residential and light commercial electronic applications where 5mm x 20mm glass fuses are specified. Common install scenarios include control boards, instrumentation, and other low-voltage electronic assemblies that require fast-acting overcurrent protection at or below 3 amps and 250 volts. The retail-carded 2-pack format makes this convenient for service stock or point-of-sale availability.
Designed as an OEM-style replacement for electronic equipment and control assemblies requiring a 5mm x 20mm fast-acting glass fuse rated at 3 amps and 250 volts.
Always de-energize and disconnect power to the equipment before replacing a fuse. Confirm the replacement fuse matches the current rating, voltage rating, and physical size specified on the equipment nameplate or schematic. Installing a fuse with a higher current rating than specified defeats overcurrent protection and creates a safety hazard. Electronic service work on control boards should follow applicable NEC guidelines and the equipment manufacturer's service documentation.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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