Cooper Bussmann ABC-4-R Cartridge Fast-acting Fuse 4A

Product Description

The COOPER BUSSMANN ABC-4-R is a ceramic-body, fast-acting cartridge fuse rated at 4 amps and designed for use in low-voltage control circuits, instrumentation panels, and light electrical equipment. Measuring 1.25 inches in overall length and 0.25 inches in diameter, this compact fuse fits standard mini cartridge fuse holders. Its fast-acting timing provides immediate overcurrent protection with an interrupting rating of 10,000 amps at 125 volts and 200 amps at 250 volts. Licensed electricians, HVAC technicians, and electronics service professionals install this fuse in control boards, panel boxes, and equipment requiring reliable short-circuit protection in a small form factor.

The ABC-4-R is suited for residential and light commercial control circuit applications where precise overcurrent protection is required. Common install scenarios include HVAC control boards, low-voltage instrumentation circuits, and electronic equipment panels. The ceramic body construction provides added containment and thermal stability under fault conditions, making it appropriate for environments where glass-body fuses are not specified or permitted.

Key Features

• Fast-acting fuse timing for immediate overcurrent response
• 4-amp rating suitable for low-voltage control and instrumentation circuits
• 10,000-amp interrupting rating at 125 volts; 200-amp interrupting rating at 250 volts
• Ceramic body construction for thermal stability and arc containment
• Compact mini cartridge form factor: 1.25 inches OAL, 0.25 inches diameter
• UL Listed and CSA Certified to multiple recognized standards

Compatibility

Designed as an OEM-style replacement for standard mini cartridge fuse holders accepting a 1.25-inch by 0.25-inch fast-acting fuse.

Installation Notes

This fuse should be installed by a qualified electrician or licensed HVAC technician. Always de-energize and lock out the circuit before replacing a fuse. Verify the replacement fuse rating matches the equipment manufacturer's specification exactly — substituting a higher-amp fuse defeats overcurrent protection and creates a fire hazard. Follow NEC requirements for fuse replacement and panel access.