Cooper Bussmann AGX-4 Cartridge Fast-acting Fuse 4A

Product Description

The COOPER BUSSMANN AGX-4 is a glass-body, fast-acting cartridge fuse rated at 4 amps and designed for overcurrent protection in low-voltage control circuits, instrumentation panels, and light electrical equipment. The miniature form factor measures 1 inch in overall length and 0.25 inches in diameter, making it a direct fit for standard AGX-type fuse holders commonly found in HVAC control panels, appliance control boards, and electronic equipment. At 125 volts, the AGX-4 carries an interrupting rating of 10,000 amps, providing reliable fault current protection in residential and light commercial applications.

This fuse is suited for use in control circuits where fast-acting overcurrent response is required. Typical install scenarios include low-voltage transformer secondary circuits, HVAC system control boards, small motor control panels, and instrumentation equipment. Electricians and HVAC technicians install this fuse type when servicing or replacing blown overcurrent protection devices in fuse holders that accept the AGX miniature cartridge format. It is sold individually but must be ordered in multiples of 5 per minimum order requirement.

Key Features

• Fast-acting fuse response for immediate overcurrent interruption
• Glass body construction allows visual inspection for blown-fuse confirmation without removal
• 10,000-amp interrupting rating at 125 volts for reliable fault protection
• 200-amp interrupting rating at 250 volts
• Miniature cartridge form factor fits standard AGX fuse holders
• cULus Recognized and UL Listed 248-14 certified

Compatibility

Designed as an OEM-style replacement for miniature glass cartridge fuse holders accepting the AGX form factor in residential and light commercial electrical and HVAC control circuit applications.

Installation Notes

Installation and replacement of control circuit fuses should be performed by a licensed electrician or qualified HVAC technician. Always de-energize the circuit and verify zero voltage with a multimeter before removing or installing a fuse. Confirm the replacement fuse amperage and voltage rating match the circuit requirements before reinstallation. Follow applicable NEC guidelines for overcurrent protection device selection and replacement.