Cooper Bussmann FNA-3/10 Cartridge Time Delay Fuse 0.3A

Product Description

The COOPER BUSSMANN FNA-3/10 is a cartridge-style, time-delay fuse rated at 0.3 amps and 250 volts. It features a pin indicator and a two-element design that tolerates harmless inrush currents while still protecting against sustained overloads and short circuits. The fuse body is green and mounts in a standard fuse holder. With an interrupting rating of 35 amps at 250 volts and an overall length of 1.5 inches, this fuse is sized for precision low-current protection in control circuits, instrumentation panels, and light commercial equipment. Installation is handled by licensed electricians and qualified control technicians.

The FNA-3/10 is suited for use in fuse holders in low-voltage control panels, HVAC equipment control circuits, instrumentation enclosures, and similar applications where time-delay protection is required for small inductive or motor loads. The pin indicator provides a visible signal when the fuse has opened, reducing diagnostic time during service calls. Its compact cartridge form fits standard holders designed for this fuse series.

Key Features

• Time-delay action tolerates normal inrush current without nuisance opening
• Pin indicator provides visible blown-fuse indication for fast troubleshooting
• Two-element construction for reliable overload and short-circuit protection
• Green body color aids quick visual identification in multi-fuse panels
• CE Certified, CSA Certified, and UL Listed for broad code compliance
• Compact 1.5-inch cartridge fits standard fuse holders

Compatibility

Designed for use in fuse holders that accept standard 1.5-inch cartridge fuses of this current rating. Verify holder rating and fuse clip size before installation.

Installation Notes

Installation and replacement should be performed by a qualified electrician or licensed technician. De-energize and lock out the circuit before removing or installing the fuse. Use an appropriately rated fuse puller when removing cartridge fuses from live or recently energized holders. Verify that the replacement fuse amperage and voltage ratings match the circuit protection requirements before restoring power.