Why Choose the Mersen NH4AAM50V800-8 Motor Fuse Link?
The Mersen NH4AAM50V800-8 is a heavy-duty DIN NH aM fuse link specifically designed to provide dependable short-circuit protection for high-power industrial motor circuits. Manufactured by Mersen, this NH Size 4a fuse link delivers outstanding current-limiting performance, protecting large motors, contactors, motor starters and associated electrical equipment from damaging fault currents while ensuring reliable operation in demanding industrial environments.
Featuring a rated current of 800 A and a 500 V AC operating voltage, the NH4AAM50V800-8 is designed to withstand the high inrush currents associated with motor starting while rapidly interrupting severe short-circuit faults. Its aM operating class makes it ideal for motor protection systems used alongside a suitable overload relay or motor protection circuit breaker.
Manufactured in the standard NH Size 4a format, this fuse link features blade contacts, live gripping lugs and a top-mounted operation indicator. Its durable ceramic construction, high breaking capacity and compliance with IEC standards make it suitable for motor control centres, industrial switchgear and low-voltage power distribution systems.
Key Advantages
- Purpose-designed aM fuse link for industrial motor short-circuit protection.
- 800 A rated current for high-power motor applications.
- 500 V AC rated voltage.
- High current-limiting performance reduces thermal and mechanical fault stress.
- Designed to withstand normal motor starting currents.
- Top-mounted indicator enables rapid visual identification of fuse operation.
- Live gripping lugs support safe replacement using approved NH fuse pullers.
Key Features
- Mersen NH fuse-links aM 500 VAC series.
- NH Size 4a.
- 800 A rated current.
- 500 V AC rated voltage.
- Partial-range aM operating class.
- 120 kA AC breaking capacity.
- Top-mounted fuse operation indicator.
- Live gripping lugs.
- Blade contact construction.
- 100 mm body width.
Reliable Short-Circuit Protection for High-Power Motors
The Mersen NH4AAM50V800-8 is engineered to interrupt high fault currents while allowing the temporary inrush currents generated during normal motor starting. Its advanced current-limiting characteristics help reduce damage to motors, conductors and switching equipment, improving system reliability and reducing maintenance costs.
As an aM partial-range fuse, the NH4AAM50V800-8 provides short-circuit protection only. It should always be coordinated with a suitable overload relay or motor protection circuit breaker to provide complete motor circuit protection.
Typical Applications
- High-power motor starter circuits.
- Motor control centres.
- Mining and processing equipment.
- Large pumps, compressors and conveyor systems.
- Heavy industrial manufacturing machinery.
- Industrial switchgear and low-voltage distribution systems.
