Why Choose the Mersen A3T40 Class T Fuse?
The Mersen A3T40 is a compact and highly reliable Class T fast-acting fuse designed to provide superior overcurrent and short-circuit protection for industrial and commercial electrical systems. As part of the trusted Mersen Amp-Trap® A3T series, it delivers exceptional current-limiting performance while maintaining a compact footprint, making it ideal for installations where both protection and space efficiency are essential.
Designed to interrupt fault currents rapidly, the A3T40 helps minimise damage to switchgear, conductors and connected equipment by significantly reducing thermal and mechanical stress during fault conditions. Its unique Class T dimensions prevent replacement with lower-performance fuse types, helping maintain electrical safety and compliance.
With a rated current of 40 A, a 300 V AC / 160 V DC voltage rating and a fast-acting characteristic, the Mersen A3T40 is ideal for protecting load centres, panelboards, switchboards, circuit breakers, metering centres and industrial control equipment.
Key Advantages
- Compact Class T fast-acting industrial fuse.
- 40 A current rating for industrial and commercial protection.
- 300 V AC and 160 V DC voltage rating.
- Extremely current-limiting design reduces equipment damage.
- Fast interruption improves electrical system safety.
- Unique Class T dimensions prevent incorrect fuse substitution.
Key Features
- Mersen Amp-Trap® A3T Class T series.
- 40 A rated current.
- 300 V AC / 160 V DC rated voltage.
- Fast-acting overcurrent protection.
- High interrupting capacity of 200 kA AC.
- Glass melamine body for dimensional stability.
- Ferrule terminal construction.
- Compact design for compatible Class T fuse holders.
Reliable Protection for Industrial Electrical Systems
Fast-acting Class T fuses are engineered to interrupt excessive fault currents before significant damage occurs. Their current-limiting performance reduces arc energy, minimises thermal stress and helps extend the service life of electrical equipment.
The Mersen A3T40 combines compact dimensions with high interrupting capacity, making it an excellent solution for modern electrical distribution systems requiring dependable overcurrent protection and efficient use of panel space.
Typical Applications
- Load centres.
- Panelboards.
- Switchboards.
- Circuit breakers.
- Metering centres.
- Industrial control panels and OEM equipment.
