Cooper Bussmann FNQ-1-1/4 Time Delay Fuse 1.25A 500V

Product Description

The COOPER BUSSMANN FNQ-1-1/4 is a cartridge-style, time-delay fuse rated at 1.25 amps and 500 volts AC, with a 10 kA interrupting capacity. Built with a fiber body and sized at 1.5 inches in length and 10.3 mm in diameter, this fuse provides reliable overcurrent protection in control circuits, motor branch circuits, and low-amperage electrical applications. The time-delay characteristic allows it to tolerate brief inrush currents without nuisance tripping, making it well suited for circuits with small motors or transformer loads. It mounts in a standard fuse holder and is installed by licensed electricians during panel builds, equipment retrofits, and control panel service work.

This fuse is designed for general-purpose overcurrent protection in residential, commercial, and light industrial electrical systems. Typical applications include HVAC control circuits, low-voltage transformer secondary protection, and small motor circuits where a time-delay response is required to handle startup inrush. The orange body color allows quick visual identification during service and inspection. It installs in a standard cartridge fuse holder compatible with its 10.3 mm diameter and 1.5-inch length.

Key Features

• 1.25-amp time-delay rating tolerates momentary inrush without nuisance tripping
• 500-volt AC rating with 10 kA interrupting capacity for reliable fault protection
• Fiber body construction for durable, compact form factor
• 10.3 mm diameter and 1.5-inch overall length fits standard cartridge fuse holders
• Orange color coding for fast visual identification during service
• UL Listed, CSA Certified, CE Certified, and RoHS Compliant

Compatibility

Designed as an OEM-style replacement for general-purpose cartridge fuse holders accepting a 10.3 mm diameter, 1.5-inch time-delay fuse rated up to 500 volts.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC). Always de-energize and lock out the circuit before replacing or inspecting fuses. Confirm the fuse holder is rated for the voltage and amperage of this fuse before installation. Do not substitute a fuse with a higher amperage rating to restore a blown circuit.