Cooper Bussmann ABC-3/4-R Cartridge Fast-acting Fuse 0.75A

Product Description

The COOPER BUSSMANN ABC-3/4-R is a ceramic cartridge fast-acting fuse rated at 0.75 amps. It is a mini-style fuse designed to protect low-current circuits by opening rapidly on fault conditions, minimizing downstream damage. The fuse measures 1.25 inches in overall length and 0.25 inches in diameter, fitting standard cartridge fuse holders used across HVAC control circuits, appliance wiring, and light industrial equipment. The interrupting rating of 10,000 amps at 125 volts and 35 amps at 250 volts reflects its suitability for low-voltage branch circuit protection. Licensed electricians and HVAC technicians are the typical installers.

This fuse is suited for residential and light commercial applications where fast-acting overcurrent protection is required on low-amperage control or accessory circuits. Common install scenarios include HVAC control boards, transformer secondary circuits, and electronic equipment requiring precise, fast-clearing fuse protection. Its ceramic body provides reliable thermal and mechanical stability in service environments with vibration or elevated ambient temperatures.

Key Features

• Fast-acting fuse timing for rapid fault clearance on sensitive low-current circuits
• Ceramic body construction for thermal stability and arc containment
• Interrupting rating of 10,000 amps at 125 volts and 35 amps at 250 volts
• Compact mini cartridge form factor: 1.25 inches OAL, 0.25 inches diameter
• Meets UL 248-14, UL Guide JDYX, CSA Class 1422-01, and multiple MIL-STD-202 standards

Compatibility

Designed as an OEM-style replacement for standard mini ceramic cartridge fuse holders rated for 0.75-amp fast-acting fuses in low-voltage control and accessory circuit applications.

Installation Notes

Installation should be performed by a qualified electrician or HVAC technician. Always de-energize the circuit and verify zero voltage with a multimeter before removing or installing a fuse. Ensure the replacement fuse matches the original amperage and interrupting rating exactly — substituting a higher-rated fuse defeats overcurrent protection. Follow applicable NEC requirements for circuit protection when servicing fused control circuits.