Why Choose the Mersen A3T20 Amp-Trap® Class T Fuse?
The Mersen A3T20 is a fast-acting Class T current-limiting fuse designed to provide reliable protection against short circuits and overcurrent conditions in industrial and commercial electrical systems. As part of the trusted Mersen Amp-Trap® A3T series, it combines exceptional current limitation with a compact physical size, making it ideal for modern electrical distribution equipment.
Manufactured with a durable glass melamine body, the A3T20 offers excellent dimensional stability and permanently blade-stamped catalogue identification for easy product recognition. Its unique Class T dimensions prevent substitution with lower-rated fuse classes, helping maintain system safety and compliance.
With a rated current of 20 A, a 300 V AC rating and a 160 V DC rating, the Mersen A3T20 is ideal for protecting panelboards, load centres, switchboards, circuit breakers, metering centres and industrial electrical distribution equipment where rapid fault interruption is essential.
Key Advantages
- Fast-acting Class T current-limiting fuse for dependable circuit protection.
- 20 A rated current for industrial and commercial electrical systems.
- 300 V AC and 160 V DC voltage ratings.
- Extremely current-limiting design reduces damaging peak fault currents.
- Compact dimensions maximise panel design flexibility.
- Unique Class T construction prevents substitution with lower-performance fuse types.
Key Features
- Mersen Amp-Trap® A3T series.
- UL Class T fuse.
- 20 A rated current.
- 300 V AC / 160 V DC rated voltage.
- Fast-acting current-limiting characteristic.
- Glass melamine body for superior dimensional stability.
- Permanent blade-stamped catalogue identification.
- Ferrule construction for compatible Class T fuse holders.
Reliable Current-Limiting Circuit Protection
Current-limiting fuses such as the Mersen A3T20 interrupt fault currents before they reach their maximum prospective value. This helps minimise thermal and mechanical stress on conductors, switchgear and connected electrical equipment, improving system reliability and reducing repair costs.
The Amp-Trap® A3T series is widely specified by electrical engineers and panel builders where compact dimensions, rapid fault clearance and high interrupting capacity are required in industrial and commercial installations.
Typical Applications
- Industrial panelboards.
- Load centres.
- Switchboards.
- Circuit breaker protection.
- Metering centres.
- Industrial machinery.
- Commercial electrical installations.
