Why Choose the Mersen NH3AM50V400 NH Fuse Link?
The Mersen NH3AM50V400 is a high-performance NH aM low voltage fuse link designed specifically to provide short-circuit protection for high-power motor circuits and industrial electrical equipment. As part of the established Mersen NH aM fuse-link series, it delivers strong current-limiting performance and dependable fault interruption in demanding motor control and power distribution applications.
With a 400 A rated current and a 500 V AC operating voltage, this NH3 fuse link is suitable for protecting large motors, motor starters and associated switchgear. Its high 120 kA AC breaking capacity enables it to safely interrupt substantial prospective fault currents before serious damage occurs.
The NH3AM50V400 features a durable ceramic body, silver-plated copper blade contacts and live gripping lugs for handling with an approved NH fuse puller. A double indicator provides clear visual confirmation when the fuse has operated, helping maintenance teams identify faults quickly and minimise industrial downtime.
Key Advantages
- Specialist aM fuse link for high-power motor circuit protection.
- 400 A rated current for demanding industrial motor applications.
- 500 V AC rated operating voltage.
- High 120 kA breaking capacity for reliable fault interruption.
- Strong current-limiting performance helps reduce thermal and mechanical stress.
- Double indicator allows rapid identification of an operated fuse.
Key Features
- Mersen NH aM fuse-link series.
- NH Size 3 construction.
- 400 A rated current.
- 500 V AC rated voltage.
- aM operating characteristic for motor circuit short-circuit protection.
- 120 kA maximum AC breaking capacity.
- Double visual operating indicator.
- Live gripping lugs for use with an appropriate NH fuse puller.
- Silver-plated copper blade contacts.
- Robust ceramic insulating body.
Reliable Short-Circuit Protection for High-Power Motors
The Mersen NH3AM50V400 is engineered to interrupt damaging short-circuit currents in large industrial motor circuits. Its aM characteristic allows normal motor starting currents to pass while rapidly disconnecting the circuit when a severe electrical fault occurs.
Because aM fuse links provide partial-range protection, the NH3AM50V400 must be used with a correctly selected overload relay, motor protection circuit breaker or other suitable overload protection device. When properly coordinated, this combination provides effective protection for motors, cables, contactors and associated control equipment.
Typical Applications
- High-power industrial motor circuits.
- Motor control centres.
- Industrial motor starters and contactor assemblies.
- Pumps, compressors and ventilation systems.
- Manufacturing and processing machinery.
- Industrial switchboards and distribution equipment.
