Why Choose the Mersen NH2AM50V400 Motor Protection Fuse-Link?
The Mersen NH2AM50V400 is a high-performance DIN NH aM low voltage fuse-link specifically developed for short-circuit protection of industrial motor circuits. Rated at 400 A and 500 V AC, this NH Size 2 fuse-link provides reliable protection for motors, motor starters, contactors and associated power distribution equipment operating in demanding industrial applications.
Part of Mersen's proven NH aM 500 V AC fuse-link range, the NH2AM50V400 features live gripping lugs with a double indication system, enabling safe handling with an approved NH fuse puller while allowing rapid visual identification after operation. Manufactured to DIN NH and IEC standards, it offers excellent current-limiting characteristics and dependable long-term performance.
The aM utilisation category is designed exclusively for motor circuit short-circuit protection. It permits normal motor starting currents without nuisance operation and should always be used alongside a suitable thermal overload relay or electronic motor protection device to provide complete motor protection.
Key Advantages
- Purpose-designed for industrial motor short-circuit protection.
- 400 A rated current for high-power motor installations.
- 500 V AC rated voltage for industrial electrical systems.
- High 120 kA breaking capacity.
- aM characteristic allows motor starting currents without nuisance operation.
- Double indicator enables rapid identification of an operated fuse.
- Live gripping lugs support safe installation and replacement.
Key Features
- Mersen NH aM 500 V AC fuse-link series.
- Catalogue number: NH2AM50V400.
- Manufacturer item number: N232519.
- 400 A rated current.
- 500 V AC rated voltage.
- NH Size 2 construction.
- aM motor protection characteristic.
- Double indication system.
- Live gripping lugs.
- Body width: 52 mm.
Reliable Protection for Industrial Motor Circuits
The Mersen NH2AM50V400 is engineered to provide rapid current limitation during short-circuit conditions, reducing the thermal and mechanical stresses experienced by motors, contactors, starters and power distribution equipment. Its high interrupting capacity makes it suitable for demanding industrial applications requiring dependable motor circuit protection.
Because this is an aM fuse-link, it should always be coordinated with an appropriate overload relay or electronic motor protection device. Together they provide comprehensive protection against both overload and short-circuit conditions while allowing normal motor starting currents to pass without unnecessary fuse operation.
Typical Applications
- Motor control centres.
- Large direct-on-line and star-delta motor starters.
- Industrial manufacturing machinery.
- Pump, fan and compressor systems.
- Heavy industrial automation equipment.
- Industrial electrical distribution panels.
