ABB AJT125 Class J Time Delay Fuse 125 Amp 600V

The ABB AJT125 is a Class J time delay fuse rated for 125 amperes, designed to provide reliable overcurrent protection in commercial and industrial electrical systems. This current-limiting fuse features a 600-volt AC rating and offers excellent short-circuit protection with an interrupting rating of 200,000 amperes RMS symmetrical.

Key Features:

• Class J time delay characteristics for motor and transformer inrush current tolerance
• 125 amp continuous current rating at 600 volts AC
• 200kA interrupting rating (200,000 amps RMS symmetrical)
• Current-limiting design minimizes let-through energy
• UL Listed and CSA certified for safety compliance
• Compact dimensions for space-efficient panel installation
• Rejection-style design prevents replacement with incorrect fuse classes

Class J fuses are ideal for protecting motor circuits, feeders, and branch circuits where temporary overloads must be tolerated while still providing fast clearing on short circuits. The time delay element allows harmless temporary overloads while the current-limiting design protects equipment from damaging fault currents.