Cooper Bussmann AGX-3 Cartridge Fast-acting Fuse 3A

Product Description

The COOPER BUSSMANN AGX-3 is a glass cartridge fast-acting fuse rated at 3 amps for overcurrent protection in low-voltage control circuits, instrumentation, and light electrical equipment. The fuse measures 1 inch in overall length and 1/4 inch in diameter, fitting standard AGX-series fuse holders. Its fast-acting blow characteristic responds quickly to overcurrent events, helping protect sensitive downstream components. With an interrupting rating of 10,000 amps at 125 volts and 100 amps at 250 volts, it covers a range of low-voltage circuit protection applications. Licensed electricians and controls technicians are the typical installers.

The AGX-3 is suited for residential and light commercial applications where small-format cartridge fuses are required. Common install scenarios include HVAC control boards, low-voltage transformer secondary circuits, electronic control panels, and instrumentation enclosures. Its compact glass body allows visual inspection of the fuse element without removal from the holder, which can speed up troubleshooting during service calls. The fast-acting timing makes it appropriate for resistive loads where inrush current is not a concern.

Key Features

• Fast-acting blow characteristic for rapid overcurrent response on resistive loads
• Glass body allows visual element inspection without removing the fuse
• Interrupting rating of 10,000 amps at 125 volts and 100 amps at 250 volts
• Compact AGX form factor: 1 inch OAL, 1/4 inch diameter
• cULus Recognized and UL Listed 248-14 certified

Compatibility

Designed as a direct-fit replacement for AGX-series fuse holders accepting 1 inch by 1/4 inch cartridge fuses in low-voltage control and instrumentation circuits.

Installation Notes

Installation should be performed by a qualified electrician or controls technician following applicable NEC guidelines. Always de-energize and verify the circuit is at zero voltage before replacing a fuse. Confirm the replacement fuse amperage and interrupting rating match the original equipment specification before installation. Never substitute a higher-amperage fuse to bypass a repeated overcurrent condition without first diagnosing the root cause.