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MERSEN FUSE NH 4 1000A 500V AM NH4AM50V1000-8
Mersen NH4AM50V1000-8 NH Size 4 aM low voltage fuse link rated at 1000 A and 500 V AC, with a 120 kA breaking capacity, top indicator and live gripping lugs for industrial motor circuit short-circuit protection.
£111.11
Why Choose the Mersen NH4AM50V1000-8 NH Fuse Link?
The Mersen NH4AM50V1000-8 is a heavy-duty NH aM low voltage fuse link engineered to provide effective short-circuit protection for large industrial motors and high-current motor control circuits. As part of the established Mersen NH aM fuse-link range, it combines strong current-limiting performance with low power losses for dependable operation in demanding electrical installations.
With a rated current of 1000 A and an operating voltage of 500 V AC, this NH Size 4 fuse link is suitable for high-power motors, motor starters, contactors and associated switchgear. Its 120 kA AC breaking capacity allows it to interrupt substantial prospective short-circuit currents safely and rapidly.
The NH4AM50V1000-8 features a robust ceramic body, silver-plated copper blade contacts and non-isolated live gripping lugs. Its top-mounted operating indicator provides a clear visual signal after operation, helping maintenance personnel identify faults and replace the fuse using a suitable low voltage HRC fuse puller.
Key Advantages
- Specialist aM fuse link for high-power motor circuit protection.
- 1000 A rated current for demanding industrial applications.
- 500 V AC rated operating voltage.
- High 120 kA AC breaking capacity.
- Strong current-limiting performance reduces fault energy.
- Top indicator enables rapid identification of an operated fuse.
Key Features
- Mersen NH aM fuse-link series.
- NH Size 4 construction.
- 1000 A rated current.
- 500 V AC rated voltage.
- aM operating characteristic for motor short-circuit protection.
- 120 kA AC breaking capacity.
- Top-mounted visual operating indicator.
- Non-isolated live gripping lugs.
- Silver-plated copper blade contacts.
- DIN-standard ceramic fuse body.
Reliable Short-Circuit Protection for High-Power Motors
The Mersen NH4AM50V1000-8 uses an aM operating characteristic developed specifically for motor circuits. It allows normal motor starting currents to pass while interrupting severe short-circuit currents from approximately 6.3 times the fuse’s rated current up to its maximum breaking capacity.
As an aM partial-range fuse, the NH4AM50V1000-8 does not provide overload protection. It must therefore be coordinated with a correctly selected overload relay, motor protection circuit breaker or equivalent protective device to provide complete protection for the motor and associated equipment.
Typical Applications
- High-power industrial motor circuits.
- Heavy-duty motor control centres.
- Large pumps, compressors and ventilation systems.
- Industrial motor starters and contactor assemblies.
- Manufacturing and process machinery.
- Industrial switchboards and power distribution equipment.
Technical Specifications
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| Fuse Indication | Visual indicator | |
|---|---|---|
| Current | 1000 A | |
| Voltage | 500 V | |
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Class | aM | |
| Manufacturer | Mersen | |
| Item number | S219137 | |
| Series | NH Fuse Links aM 500 VAC | |
| Model | NH4AM50V1000-8 | |
| EAN / UPC | 4086500032143 | |
| Product type | NH low voltage motor fuse link | |
| Fuse size | NH4 | |
| Rated current | 1000 A | |
| Rated voltage | 500 V AC | |
| Current type | AC | |
| Operating characteristic | aM | |
| Rated AC breaking capacity | 120 kA | |
| Protection type | Partial-range motor short-circuit protection | |
| Indicator | Top indicator | |
| Gripping lugs | Non-isolated live gripping lugs | |
| Terminal type | Solid blade contacts | |
| Terminal material | Silver-plated copper | |
| Body material | Ceramic | |
| Dimensions (L × W × H) | 200 × 100 × 117 mm | |
| Power dissipation at rated current | 80 W | |
| Weight | Approx. 2.18 kg | |
| Standards | IEC 60269-1, IEC 60269-2 and VDE 0636 Part 201 | |
| RoHS compliant | Yes | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH4AM50V1000-8 used for?
This fuse link provides short-circuit protection for high-current industrial motors, motor starters, contactors and associated electrical equipment.
What is the rated current of this fuse?
The Mersen NH4AM50V1000-8 has a rated current of 1000 A.
What does the aM operating characteristic mean?
An aM fuse is a partial-range fuse designed for motor circuit short-circuit protection. It permits normal motor starting currents but must be combined with separate overload protection.
What is the breaking capacity of the NH4AM50V1000-8?
The fuse link has a rated AC breaking capacity of 120 kA.
What fuse base is required?
The NH4AM50V1000-8 must be installed in a compatible NH Size 4 fuse base rated for the circuit voltage, operating current and prospective fault level.
Trusted for High-Power Motor Protection
Mersen NH aM fuse links are widely specified by electrical engineers, panel builders and industrial maintenance teams for dependable, current-limiting protection of high-power motors and critical motor control equipment.
