Cooper Bussmann GDB-1.25A Fast-acting Cartridge Fuse 1.25A

Product Description

The COOPER BUSSMANN GDB-1.25A is a glass cartridge fast-acting fuse rated at 1.25 amps. It is designed for overcurrent protection in low-voltage control circuits, instrumentation panels, and electronic equipment where fast response to fault conditions is critical. The fuse body measures 20 mm in overall length and 5 mm in diameter, conforming to the standard IEC miniature fuse form factor. Licensed electricians, controls technicians, and electronics service professionals install this type of fuse in panel-mounted fuse holders and inline fuse clips requiring the 5x20 mm form factor.

This fuse is suited for residential and commercial control panels, test and measurement instruments, telecommunications equipment, and industrial control enclosures where low-amperage branch circuit or component-level protection is required. Its fast-acting blow characteristic makes it appropriate for circuits without high inrush loads, where immediate interruption on overcurrent is the correct protective response. The 5x20 mm cartridge size is one of the most widely used miniature fuse formats in both North American and international equipment.

Key Features

• Fast-acting fuse timing provides immediate response to overcurrent events with no intentional time delay
• Glass body construction allows visual confirmation of fuse condition without removal
• 1.25-amp rating suits low-current control and instrumentation circuits
• 5x20 mm IEC standard form factor fits a wide range of panel-mount and inline fuse holders
• Carries multiple certifications including cURus, CE, IEC 60127-2, CCC, RoHS Compliant, IMQ, SEMKO, and BSI Approved
• UL Recognized under Guide JDYX2, File E19180

Compatibility

Designed for use in 5x20 mm fuse holders across residential, commercial, and industrial control and instrumentation applications meeting IEC 60127-2 miniature fuse standards.

Installation Notes

Always de-energize and lock out the circuit before replacing any fuse. Confirm the replacement fuse rating matches the circuit design exactly — substituting a higher-amperage fuse defeats overcurrent protection and creates a fire hazard. Use an insulated fuse puller when removing cartridge fuses from live-adjacent panel holders. Verify fuse holder contact integrity and clip tension before reinstalling.