Cooper Bussmann FNM-2-1/2 Cartridge Time Delay Fuse 2.5A

Product Description

The COOPER BUSSMANN FNM-2-1/2 is a general-purpose cartridge time delay fuse rated at 2.5 amps and 250 volts. It features a melamine body and mounts in a standard fuse holder. Time delay construction allows temporary inrush currents to pass without nuisance blowing, making it well suited for motor loads, control circuits, and HVAC applications where startup surge is a factor. The interrupting rating is 100 amps at 250 volts. Overall dimensions are 1.5 inches in length and 10.3 mm in diameter. Electricians and HVAC technicians install this fuse as a branch-circuit or control-circuit protective device.

This fuse is used in residential and light commercial control panels, low-voltage control circuits, and HVAC equipment requiring a small-amperage time delay protective element. It installs in a compatible fuse holder and is appropriate where IEC and North American fuse standards intersect. The green body color aids in visual identification during panel servicing. Its compact cartridge form fits standard midget fuse holders common in HVAC control boards and motor control panels.

Key Features

• 2.5A time delay rating handles motor inrush without nuisance trips
• 250V maximum voltage rating for control and branch circuit use
• Melamine body construction provides heat and arc resistance
• 100A interrupting rating at 250V for reliable fault clearing
• Green body color for quick visual identification in the field
• UL Listed 248-14, CSA Certified, CE Marked, and RoHS Compliant

Compatibility

Designed as an OEM-style replacement for midget cartridge time delay fuses in standard fuse holders rated for the FNM series form factor. Specific compatible holder models were not provided in the product data.

Installation Notes

This fuse should be installed by a licensed electrician or qualified HVAC technician following applicable NEC requirements. De-energize and lock out the circuit before removing or replacing any fuse. Verify the replacement fuse matches the amperage, voltage, and time delay class of the original before installation. Never substitute a higher-amperage fuse or bypass the fuse holder.