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MERSEN FUSE NH 2 400A 500V AM NH2AM50V400
Mersen NH2AM50V400 DIN NH Size 2 aM motor protection fuse-link rated at 400 A and 500 V AC with live gripping lugs, double indication and 120 kA breaking capacity.
£14.12
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.
Technical Specifications
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| Fuse Indication | Dual indicator | |
|---|---|---|
| Current | 400 A | |
| Voltage | 500 V | |
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH2 | |
| Fuse Class | aM | |
| Manufacturer | Mersen | |
| Series | NH aM 500 V AC Fuse-Links | |
| Model | NH2AM50V400 | |
| Manufacturer reference | N232519 | |
| Product type | NH motor protection fuse-link | |
| Utilisation category | aM | |
| Fuse size | NH2 | |
| Rated current | 400 A | |
| Rated voltage | 500 V AC | |
| Breaking capacity | 120 kA AC | |
| Frequency | 50 / 60 Hz | |
| Power dissipation | 29.7 W | |
| Body width | 52 mm | |
| Weight | Approx. 0.64 kg | |
| Indicator | Double indicator | |
| Terminal type | Silver-plated copper plain blades with live gripping lugs | |
| Body material | Ceramic | |
| Mounting | Compatible NH2 fuse base | |
| RoHS | Compliant | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH2AM50V400 used for?
It is designed to provide short-circuit protection for high-power industrial motor circuits and associated electrical equipment.
What is the current rating of this fuse?
The NH2AM50V400 has a 400 A current rating.
What voltage is this fuse designed for?
This fuse-link is rated for operation on systems up to 500 V AC.
What does the aM classification mean?
The aM characteristic is intended for motor short-circuit protection only and must be used alongside a suitable overload protection device.
What is the benefit of the double indicator?
The integrated double indicator provides clear visual confirmation when the fuse has operated, allowing maintenance engineers to identify a blown fuse quickly and safely.
Trusted by Industrial Professionals Worldwide
Mersen NH aM fuse-links are trusted by OEMs, panel builders and industrial maintenance engineers for delivering dependable motor circuit protection, high breaking capacity and reliable long-term performance in demanding industrial environments.
