Why Choose the Mersen A3T400 Class T Fuse?
The Mersen A3T400 is a premium Class T fast-acting fuse engineered to deliver outstanding overcurrent and short-circuit protection for industrial and commercial electrical systems. As part of the trusted Mersen Amp-Trap® A3T series, it combines exceptional current-limiting performance with a compact blade design, making it ideal for high-current applications where maximum protection and space efficiency are essential.
Designed to interrupt high fault currents almost instantaneously, the A3T400 helps minimise damage to switchgear, conductors and connected electrical equipment. Its unique Class T dimensions prevent substitution with lower-rated fuse classes, helping maintain electrical safety and system integrity while reducing costly downtime.
With a rated current of 400 A, a 300 V AC / 160 V DC voltage rating and fast-acting performance, the Mersen A3T400 is ideal for protecting switchboards, panelboards, load centres, motor control centres and industrial power distribution equipment.
Key Advantages
- Compact Class T fast-acting industrial fuse.
- 400 A current rating for demanding power distribution applications.
- 300 V AC and 160 V DC voltage rating.
- Extremely current-limiting design helps minimise equipment damage.
- Fast fault interruption improves electrical system safety.
- Unique Class T dimensions prevent incorrect fuse replacement.
Key Features
- Mersen Amp-Trap® A3T Class T fuse series.
- 400 A rated current.
- 300 V AC / 160 V DC rated voltage.
- Fast-acting overcurrent protection.
- High interrupting capacity.
- Glass melamine body for dimensional stability.
- Blade terminal construction.
- Compact design for compatible Class T fuse holders.
Reliable Protection for Industrial Electrical Systems
Fast-acting Class T fuses interrupt excessive fault currents before they can cause significant damage to electrical systems. Their highly current-limiting characteristics reduce arc energy, thermal stress and mechanical forces, helping extend the operational life of switchgear and connected equipment.
The Mersen A3T400 is designed for demanding industrial environments where dependable overcurrent protection, high interrupting capacity and compact installation are essential for reliable power distribution.
Typical Applications
- Industrial switchboards.
- Panelboards and load centres.
- Motor control centres.
- Power distribution equipment.
- Industrial machinery.
- OEM electrical systems.
