Cooper Bussmann JJN-100 Class T Cartridge Fuse 100A

Product Description

The COOPER BUSSMANN JJN-100 is a Class T fast-acting cartridge fuse rated at 100 amps for general-purpose overcurrent protection in industrial and commercial electrical systems. It measures 2-5/32 inches overall length and 3/4 inch in diameter, fitting standard Class T bolt-on fuse holders. With an interrupting rating of 200 kA at AC (RMS) and 20 kA at DC, this fuse handles high-fault-current environments where fast, reliable overcurrent protection is required. Licensed electricians and industrial maintenance technicians install this fuse in panelboards, disconnect switches, and motor control centers where Class T fusing is specified.

The JJN-100 is suited for general-purpose applications in both commercial and light industrial settings. Its bolt-on mount type makes it compatible with standard Class T fuse blocks and holders. The compact cartridge body fits within the physical envelope required by Class T fusing standards, making it a straightforward replacement in existing installations that call for a 100-amp Class T fast-acting fuse.

Key Features

• 100-amp fast-acting response for immediate overcurrent interruption
• 200 kA interrupting rating at AC (RMS) for high-fault-current environments
• 20 kA interrupting rating at DC
• Bolt-on mount for secure, low-resistance connection in fuse holders
• CE Certified, CSA C22.2 No. 248.15 Certified, and UL Listed 248-15 Class T (Guide JDDZ File E4273)
• Compact cartridge body: 2-5/32 inches OAL, 3/4 inch diameter

Compatibility

Designed as an OEM-style replacement for standard Class T fuse holders and disconnect switches requiring a 100-amp fast-acting cartridge fuse with bolt-on mounting.

Installation Notes

Installation must be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and any applicable local codes. Always de-energize and lockout/tagout the circuit before removing or installing fuses. Verify the fuse holder is rated for Class T cartridge fuses and confirm the holder's voltage and amperage ratings match the circuit requirements before installation.