Cooper Bussmann JJS-25 Class T Fuse 25A 600V

Product Description

The COOPER BUSSMANN JJS-25 is a Class T fast-acting cartridge fuse rated at 25 amps and 600 volts AC. It is designed for general-purpose overcurrent protection in high-capacity electrical systems where fast response to fault conditions is required. The fuse measures 1.5 inches in overall length and 14.3 mm in diameter, fitting standard Class T fuse holders. With an interrupting rating of 200 kA at AC RMS, it handles high available fault currents safely. Electricians and industrial maintenance technicians install this fuse in panelboards, disconnect switches, and equipment requiring Class T fusing.

Class T fuses are commonly specified in commercial and industrial electrical installations where space-saving fuse dimensions and high interrupting capacity are required. The JJS-25 is appropriate for branch circuit and equipment protection in systems up to 600 volts. Its fast-acting characteristic provides rapid clearing of overloads and short circuits, limiting thermal and magnetic stress on downstream components.

Key Features

• 25-amp rating with 600-volt AC rating for commercial and industrial branch circuit protection
• 200 kA interrupting rating at AC RMS for high fault-current environments
• Fast-acting fuse timing provides rapid overcurrent response to protect sensitive equipment
• Compact cartridge body at 1.5 inches length and 14.3 mm diameter fits Class T fuse holders
• CE Certified, CSA Certified, and UL Listed to applicable Class T fuse standards

Compatibility

Designed for use in Class T fuse holders rated for 600-volt service. Consult the fuse holder manufacturer specifications to confirm dimensional and voltage compatibility before installation.

Installation Notes

Installation should be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize and lock out the circuit before replacing any fuse. Verify that the replacement fuse matches the ampere rating, voltage rating, and fuse class specified for the application. Never substitute a higher-amperage fuse or a different fuse class without engineering review.