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MERSEN FUSE NH 4A 500A 500V AM NH4AAM50V500-8
Mersen NH4AAM50V500-8 NH Size 4a aM low voltage fuse link rated at 500 A and 500 V AC for industrial motor circuit short-circuit protection.
£104.98
Why Choose the Mersen NH4AAM50V500-8 NH Fuse Link?
The Mersen NH4AAM50V500-8 is a heavy-duty NH aM low voltage fuse link designed to provide dependable short-circuit protection for large industrial motor circuits and high-power electrical installations. Part of the trusted Mersen NH aM fuse-link series, this fuse is engineered for applications requiring exceptional fault protection, high breaking capacity and reliable performance under demanding operating conditions.
With a 500 A rated current and a 500 V AC operating voltage, the NH4AAM50V500-8 is ideally suited for protecting high-power motors, motor starters and associated switchgear. Its NH Size 4a construction features a top-mounted operating indicator and live gripping lugs, allowing rapid inspection and safer replacement using an approved NH fuse puller.
Designed in accordance with IEC and DIN NH standards, this fuse link provides excellent current-limiting performance and a high interrupting capacity, helping protect valuable industrial equipment while minimising downtime following electrical faults.
Key Advantages
- Specialist aM fuse link for industrial motor circuit protection.
- 500 A rated current for high-power applications.
- 500 V AC operating voltage.
- 120 kA AC breaking capacity for dependable fault interruption.
- Top-mounted operating indicator for rapid fault identification.
- Live gripping lugs allow safer installation and replacement.
Key Features
- Mersen NH aM fuse-link series.
- NH Size 4a.
- 500 A rated current.
- 500 V AC rated voltage.
- aM operating characteristic for motor circuit short-circuit protection.
- 120 kA AC breaking capacity.
- Top visual operating indicator.
- Live gripping lugs.
- Ceramic fuse body with silver-plated copper blade contacts.
- 100 mm body width.
Reliable Short-Circuit Protection for Large Motor Installations
The Mersen NH4AAM50V500-8 is specifically designed to protect large industrial motors against damaging short-circuit faults while allowing normal motor starting currents to pass uninterrupted. Its aM operating characteristic makes it ideal for use alongside correctly selected overload relays or motor protection devices to provide complete motor protection.
Its robust ceramic construction, silver-plated blade contacts and high fault interrupting capability make it suitable for heavy industrial environments where reliability and electrical safety are essential.
Typical Applications
- Large industrial motor control centres.
- Heavy-duty motor starters.
- Industrial switchboards.
- Power distribution equipment.
- Manufacturing and processing plants.
- OEM machinery and automation systems.
Technical Specifications
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| Current | 500 A | |
|---|---|---|
| Fuse Indication | Visual indicator | |
| Voltage | 500 V | |
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH4a | |
| Fuse Class | aM | |
| Manufacturer | Mersen | |
| Item number | R233557 | |
| Series | NH Fuse-links aM 500 VAC | |
| Model | NH4AAM50V500-8 | |
| Product type | NH low voltage fuse link | |
| Fuse size | NH4a | |
| Rated current | 500 A | |
| Rated voltage | 500 V AC | |
| Operating characteristic | aM | |
| Breaking capacity | 120 kA AC | |
| Indicator | Top indicator | |
| Connection type | Live gripping lugs | |
| Body width | 100 mm | |
| Power dissipation at rated current | 38 W | |
| Weight | Approx. 2.2 kg | |
| Standards | IEC / DIN NH | |
| RoHS compliant | Yes | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH4AAM50V500-8 used for?
This fuse link provides short-circuit protection for high-power industrial motors, motor starters and associated electrical equipment.
What is the current rating of this fuse?
The NH4AAM50V500-8 has a 500 A rated current.
What does the aM operating characteristic mean?
The aM characteristic provides motor circuit short-circuit protection while allowing normal motor starting currents. It should always be used with an appropriate overload protection device.
What is the rated voltage?
This fuse is designed for industrial systems operating up to 500 V AC.
What is the purpose of the top indicator?
The integrated top indicator provides a clear visual indication when the fuse has operated, helping maintenance engineers quickly identify and replace blown fuse links.
Trusted for Industrial Motor Protection
Mersen NH aM fuse links are trusted worldwide by electrical engineers, panel builders and industrial maintenance teams for delivering dependable short-circuit protection in demanding motor control and power distribution applications.
