Cooper Bussmann T-20 Plug Time Delay Fuse 20A 125V

Product Description

The COOPER BUSSMANN T-20 is a plug-type, time delay fuse rated at 20 amps and 125 volts with a 10 kA interrupting capacity (RMS symmetrical). It features a 2-1/4 inch diameter plug body and a dual-element design that tolerates brief motor startup surges and inrush currents without nuisance tripping, while still providing reliable overcurrent protection during sustained fault conditions. The plastic fuse body mounts into a standard plug fuse holder and is a common choice for service panels, small appliance circuits, and older residential electrical systems. Licensed electricians and qualified service technicians install this class of fuse.

This fuse is suited for residential and light commercial electrical panels where Edison-base plug fuse sockets are present. The time delay (dual-element) characteristic makes it appropriate for circuits serving small motors, compressors, and inductive loads that draw higher current on startup. It is installed in a screw-in fuse holder and is commonly used for branch circuit overcurrent protection in older construction where plug fuse panels have not been upgraded to breaker panels.

Key Features

• 20 amp rating with time delay dual-element design for inrush tolerance
• 125 volt AC rated for standard residential branch circuits
• 10 kA interrupting capacity (RMS symmetrical) for fault protection
• 2-1/4 inch diameter plug body fits standard Edison-base fuse holders
• Plastic fuse body construction
• CE and UL Listed (Guide JEF, File E12112)

Compatibility

Designed for use in standard Edison-base plug fuse holders rated for 125V residential and light commercial branch circuit applications.

Installation Notes

Installation and replacement of plug fuses must be performed with the circuit de-energized at the main disconnect before touching the fuse panel. Verify that the replacement fuse amperage matches the circuit rating — never install a higher-amperage fuse than the circuit conductor is rated for. Work on residential electrical panels must comply with NFPA 70 (NEC) requirements and applicable local codes. Always confirm the fuse holder is in good condition and free of corrosion or heat damage before installing a new fuse.