Cooper Bussmann JJN-10 Class T Fast-acting Fuse 10A 300V

Product Description

The COOPER BUSSMANN JJN-10 is a Class T fast-acting cartridge fuse rated at 10 amps and 300 volts AC. Designed for general-purpose overcurrent protection, it delivers a 200 kA AC (RMS) interrupting rating in a compact cartridge body measuring 0.875 inches in length and 10.3 mm (approximately 0.406 inches) in diameter. The fast-acting response characteristic makes it well-suited for circuits where rapid fault clearing is required without intentional time delay. Electricians and industrial maintenance technicians install this fuse in control panels, distribution equipment, and branch circuit protection applications where Class T fuse dimensioning and high interrupting capacity are specified.

The JJN-10 is appropriate for use in residential, commercial, and light industrial electrical systems requiring a compact, high-interrupting-capacity Class T fuse. It fits standard Class T fuse holders and fusible disconnect blocks designed for the 10.3 mm diameter cartridge form factor. Applications include motor control circuits, transformer secondaries, and branch circuit protection panels where fast-acting overcurrent response is required and available fault current demands a high-kA-rated device.

Key Features

• Fast-acting fuse timing for rapid overcurrent clearing without intentional delay
• 200 kA AC (RMS) interrupting rating for high-fault-current environments
• Compact cartridge body: 0.875 inches long, 10.3 mm diameter
• CE Certified, CSA C22.2 No. 248.15 Class 1422-02 Certified, and UL Listed 248-15 Class T for verified compliance
• General-purpose Class T classification for broad control and distribution circuit use

Compatibility

Designed as an OEM-style replacement or direct-install Class T cartridge fuse for standard Class T fuse holders and fusible disconnects accepting a 10.3 mm diameter cartridge body.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize and lock out the circuit before removing or installing any fuse. Verify that the fuse holder or disconnect block is rated for Class T cartridge fuses at or above the voltage and interrupting rating of this device. Never replace a fuse with one of a higher ampere rating than the circuit protection design calls for.