Why Choose the Mersen NH4AM50V500-8 NH Fuse-Link?
The Mersen NH4AM50V500-8 is a high-capacity DIN NH aM fuse-link engineered to provide dependable short-circuit protection for large industrial motors, motor starters and heavy-duty electrical installations. As part of the proven Mersen NH aM 500 V AC fuse series, it delivers reliable protection for demanding motor control and power distribution applications.
Manufactured to DIN NH and IEC standards, this NH4 size fuse-link features a top-mounted indicator and live gripping lugs, allowing quick visual identification of an operated fuse while enabling safe replacement by qualified personnel. Its robust ceramic construction and high breaking capacity make it ideal for critical industrial installations.
With a 500 A current rating, 500 V AC rated operating voltage and a 120 kA breaking capacity, the NH4AM50V500-8 is designed specifically for motor circuit short-circuit protection where overload protection is provided separately by motor protection devices.
Key Advantages
- Designed specifically for motor circuit short-circuit protection.
- 500 A rated current for heavy-duty industrial applications.
- 500 V AC IEC rating for low voltage power distribution.
- 120 kA breaking capacity for dependable fault interruption.
- Top-mounted visual indicator provides clear fuse status identification.
- Live gripping lugs enable safer installation and replacement.
Key Features
- Mersen NH aM fuse-link series.
- Catalogue number: NH4AM50V500-8.
- 500 A rated current.
- 500 V AC rated voltage.
- DIN NH Size 4 fuse-link.
- aM utilisation category for motor circuit protection.
- 120 kA AC breaking capacity.
- Top-mounted fuse indicator.
- Live gripping lugs.
- 100 mm body width.
- High-strength ceramic construction.
Reliable Protection for High-Power Motor Installations
The Mersen NH4AM50V500-8 protects high-power motors and associated equipment against damaging short-circuit currents while allowing the high inrush currents associated with motor starting. The aM operating class is intended for motor circuit short-circuit protection and should always be paired with suitable overload protection.
Its DIN NH design ensures compatibility with standard NH Size 4 fuse bases used throughout industrial switchgear, motor control centres and low voltage power distribution systems, providing dependable protection and long operational life.
Typical Applications
- Motor control centres (MCCs).
- Large industrial motor starters.
- Heavy-duty variable speed drive systems.
- Industrial switchboards.
- Power distribution equipment.
- OEM machinery and process automation systems.
