Why Choose the Mersen AJT80 Class J Fuse?
The Mersen AJT80 is a high-performance 80 A Class J time-delay fuse designed to protect industrial electrical systems against overloads and short circuits. As part of the trusted Mersen Amp-Trap 2000 AJT series, it combines current-limiting protection with the ability to withstand temporary inrush currents generated by motors, transformers and other inductive loads.
Its dual-element time-delay construction helps prevent unnecessary fuse operation during normal equipment start-up while responding rapidly to dangerous fault currents. This makes the AJT80 suitable for motor branch circuits, industrial machinery, control panels, transformers and power distribution equipment where dependable protection and operational continuity are essential.
With a rated current of 80 A and voltage ratings of up to 600 V AC and 500 V DC, the Mersen AJT80 is suitable for demanding commercial and industrial installations. Its compact Class J format helps conserve panel space, while its high interrupting capacity supports safe operation in systems with substantial available fault current.
Key Advantages
- Reliable Class J time-delay fuse for industrial circuit protection.
- 80 A current rating for machinery and power distribution applications.
- 600 V AC and 500 V DC voltage ratings.
- Current-limiting operation helps reduce damaging peak fault current and energy.
- Time-delay performance accommodates normal motor and transformer inrush currents.
- Compact Class J dimensions help reduce control-panel space requirements.
Key Features
- Mersen Amp-Trap 2000 AJT series.
- 80 A rated current.
- 600 V AC and 500 V DC rated voltage.
- Class J dual-element time-delay construction.
- Current-limiting technology for enhanced equipment protection.
- High interrupting capacity for industrial fault-current conditions.
- Blade-style terminals for compatible Class J fuse holders.
- Suitable for branch circuits, motors, transformers and industrial machinery.
Reliable Protection for Industrial Electrical Systems
The Mersen AJT80 protects electrical equipment by interrupting excessive current before conductors and connected components sustain serious thermal or mechanical damage. During a short circuit, its current-limiting design restricts the peak current and total fault energy passing through the protected circuit.
Unlike a fast-acting fuse, the AJT80 incorporates a time delay that tolerates harmless temporary surges caused by motor starting, transformer energisation and similar operating conditions. This balance of inrush tolerance and rapid fault interruption makes it an effective choice for demanding industrial power and automation systems.
Typical Applications
- Industrial motor branch circuits.
- Transformers and control transformers.
- Machinery and automation control panels.
- Switchboards and power distribution equipment.
- Heating and resistive-load circuits.
- Industrial lighting and general branch circuits.
