Why Choose the Mersen AJT2-1/4N Class J Time-Delay Fuse?
The Mersen AJT2-1/4N is a compact Class J time-delay fuse designed to provide dependable overcurrent protection for industrial and commercial electrical systems. Part of the established Amp-Trap 2000® AJT series, it combines effective current limitation with time-delay characteristics that accommodate temporary motor-starting and transformer inrush currents.
Engineered for low-current branch circuit applications, the AJT2-1/4N helps protect motors, transformers, control circuits and industrial equipment against sustained overloads and short circuits. Its compact Class J construction supports space-efficient panel designs while delivering high fault-interruption performance in demanding electrical installations.
With a rated current of 2.25 A and voltage ratings of up to 600 V AC and 500 V DC, the AJT2-1/4N is suitable for industrial control panels, automation equipment, HVAC systems and OEM machinery. The N suffix identifies this product as a non-indicating fuse without a visual open-fuse indicator.
Key Advantages
- Compact Class J time-delay fuse for industrial branch circuits.
- 2.25 A current rating for low-current equipment and control applications.
- 600 V AC and 500 V DC voltage ratings.
- Time-delay operation accommodates temporary motor and transformer inrush currents.
- Current-limiting construction helps reduce fault energy and equipment damage.
- Space-saving dimensions support compact control panel layouts.
Key Features
- Mersen Amp-Trap 2000® AJT series.
- 2.25 A current rating.
- 600 V AC / 500 V DC rated voltage.
- Class J time-delay construction.
- Ferrule-style terminal configuration.
- Non-indicating N version.
- Advanced current-limiting technology.
- Suitable for motors, transformers, feeders and branch circuits.
Reliable Protection for Industrial Electrical Systems
The AJT2-1/4N is designed to tolerate normal temporary inrush currents generated when motors start or transformers are energised. This controlled time-delay response helps prevent unnecessary fuse operation while maintaining effective protection against sustained overload conditions.
During a severe short circuit, its current-limiting design restricts the peak current and energy passed to downstream equipment. This helps reduce thermal and mechanical stress on conductors, contactors, control components and connected machinery, supporting improved safety and system reliability.
Typical Applications
- Industrial control panels.
- Motor branch circuits.
- Transformer protection.
- HVAC and refrigeration equipment.
- OEM machinery.
- Industrial automation systems.
- Electrical distribution panels.
- Low-current feeder and branch circuits.
