Why Choose the Mersen AJT600 Class J Time-Delay Fuse?
The Mersen AJT600 is a high-capacity Class J time-delay fuse designed to provide dependable overcurrent protection for demanding industrial electrical systems. Part of the established Mersen Amp-Trap 2000® AJT series, it combines time-delay performance with advanced current limitation, making it suitable for main circuits, feeders, motor circuits, transformers and heavy-duty distribution equipment.
The AJT600 is engineered to withstand normal temporary inrush currents produced during motor starting and transformer energisation while responding effectively to sustained overloads and short circuits. Its Class J construction requires approximately half the mounting space of comparable 600 V AC Class RK fuses, supporting more efficient switchboard and control-panel layouts.
With a rated current of 600 A and a voltage rating of 600 V AC / 400 V DC, the AJT600 is suited to high-current industrial installations where reliable fault interruption is essential. Its blade terminals and clip-or-bolted mounting configuration provide secure installation in compatible Class J fuse holders and fused switches.
Key Advantages
- High-capacity Class J time-delay fuse for demanding industrial protection.
- 600 A current rating for main, feeder and heavy-duty branch circuits.
- 600 V AC / 400 V DC voltage rating.
- Time-delay operation accommodates normal motor and transformer inrush currents.
- Current-limiting performance helps reduce damaging fault energy.
- Compact Class J footprint supports space-efficient equipment design.
Key Features
- Mersen Amp-Trap 2000® AJT series.
- 600 A rated current.
- 600 V AC / 400 V DC rated voltage.
- Class J time-delay operating characteristic.
- Blade-terminal construction.
- 200 kA AC interrupting rating.
- Clip or bolted mounting options.
- Brass terminal material.
- Advanced current-limiting protection.
- Supports IEC Type 2 No Damage protection.
- RoHS-compliant construction.
Reliable Protection for High-Current Industrial Systems
The Mersen AJT600 helps protect conductors, transformers, motors, switchgear and distribution equipment by interrupting dangerous overcurrents before excessive fault energy can cause serious damage. Its time-delay response permits normal temporary equipment-starting currents while maintaining reliable protection against sustained overloads and short-circuit conditions.
During a high-level fault, the fuse's current-limiting characteristics restrict peak current and let-through energy. This helps reduce thermal stress, mechanical forces and potential damage to downstream components, supporting improved system reliability and reduced downtime.
Typical Applications
- Main electrical distribution circuits.
- High-current feeder protection.
- Motor control centres.
- Large motor branch circuits.
- Industrial transformer protection.
- Switchboards and distribution panels.
- Heavy industrial machinery.
- Fused disconnect switches.
- Commercial and industrial power systems.
