Cooper Bussmann BP/FNM-12 Time Delay Midget Fuse 12A

Product Description

The COOPER BUSSMANN BP/FNM-12 is a Type FNM time delay cartridge midget fuse rated at 12 amps and 125 volts. It is designed to provide overcurrent protection in control circuits, small motors, and low-voltage equipment where a brief startup inrush must be tolerated before the fuse acts. The time delay characteristic prevents nuisance tripping on harmless transient surges while still clearing sustained fault currents quickly. Each carded retail pack contains two fuses, making it a practical replacement option for service calls. Electricians, HVAC technicians, and control panel technicians are the typical installers of this fuse type.

This fuse is suited for residential and light commercial applications including HVAC control circuits, small motor branch circuits, transformer secondary protection, and instrumentation panels. The FNM series midget form factor fits standard 13/32-inch x 1-1/2-inch midget fuse holders and fuse blocks commonly found in equipment control boxes and panel assemblies. The 2-pack carded format is convenient for field service stock and bench inventory alike.

Key Features

• 12 amp rating with 125 volt AC rating for control and motor circuit protection
• Type FNM time delay design tolerates motor startup inrush without nuisance tripping
• Cartridge midget form factor fits standard 13/32-inch x 1-1/2-inch midget fuse holders
• Carded 2-pack format for convenient field service restocking
• Compact package dimensions: 2.375 inches long x 1.375 inches wide x 0.25 inches high

Compatibility

Designed as an OEM-style replacement for equipment requiring a Type FNM time delay midget fuse rated 12 amps at 125 volts in a standard 13/32-inch x 1-1/2-inch cartridge midget fuse holder.

Installation Notes

Installation should be performed by a licensed electrician or qualified HVAC technician in accordance with the NEC. Always de-energize and lockout/tagout the circuit before replacing a fuse. Verify the replacement fuse amp rating and voltage rating match the equipment nameplate and original fuse specifications before closing the fuse holder. Do not substitute a higher-amp fuse to address repeated blowing — investigate the root cause of the overcurrent condition first.