Why Choose the Mersen AJT150 Class J Time-Delay Fuse?
The Mersen AJT150 is a high-performance Class J time-delay fuse designed to provide dependable overcurrent protection for industrial and commercial electrical systems. As part of the established Amp-Trap 2000® AJT series, it combines advanced current-limiting performance with time-delay characteristics that accommodate temporary motor-starting and transformer inrush currents.
Engineered for demanding branch circuit and feeder applications, the AJT150 helps protect motors, transformers, switchgear, distribution equipment and industrial machinery against damaging overloads and short circuits. Its compact Class J construction supports space-efficient panel designs while providing a high interrupting capacity for reliable operation during severe electrical faults.
With a rated current of 150 A and voltage ratings of up to 600 V AC and 400 V DC, the AJT150 is suitable for motor control centres, power distribution panels, switchboards and OEM equipment. Its blade-style terminals provide secure installation in compatible Class J fuse holders and fused disconnect devices.
Key Advantages
- Heavy-duty Class J time-delay fuse for industrial circuit protection.
- 150 A current rating for feeders, motors and distribution systems.
- 600 V AC and 400 V DC voltage ratings.
- Time-delay performance accommodates temporary motor and transformer inrush currents.
- Current-limiting construction helps minimise damage to downstream equipment.
- Compact Class J format reduces control panel space requirements.
Key Features
- Mersen Amp-Trap 2000® AJT series.
- 150 A current rating.
- 600 V AC / 400 V DC rated voltage.
- Class J time-delay fuse.
- Blade-style terminal configuration.
- Advanced current-limiting design.
- SmartSpot® visual open-fuse indication.
- Suitable for branch circuits, feeders, motors and transformers.
Reliable Protection for Industrial Electrical Systems
The Mersen AJT series is engineered to tolerate temporary inrush currents generated by motors, transformers and other inductive loads while responding effectively to sustained overloads and short circuits. This performance helps prevent nuisance fuse operation while maintaining dependable protection for valuable electrical equipment.
The AJT150 limits the fault energy passed to downstream conductors and components, helping reduce thermal and mechanical stress during short-circuit conditions. This can improve electrical safety, minimise equipment damage and reduce costly disruption in industrial installations.
Typical Applications
- Industrial motor control centres.
- Electrical feeders and branch circuits.
- Transformer protection.
- Power distribution panels and switchboards.
- HVAC and refrigeration systems.
- OEM machinery and industrial automation equipment.
