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MERSEN FUSE NH 4 1250A 500V AM NH4AM50V1250-8
Mersen NH4AM50V1250-8 DIN NH4 aM fuse link rated at 1250 A and 500 V AC with a 120 kA breaking capacity for industrial motor short-circuit protection.
£113.03
Why Choose the Mersen NH4AM50V1250-8 Motor Protection Fuse Link?
The Mersen NH4AM50V1250-8 is a heavy-duty DIN NH aM fuse link designed specifically for the short-circuit protection of motor circuits and associated industrial electrical equipment. Manufactured by Mersen, this NH4 fuse link delivers exceptional fault-clearing performance while allowing the high inrush currents commonly experienced during motor starting.
Part of the trusted Mersen NH aM 500 V AC fuse series, this fuse features live gripping lugs and a top operating indicator for safer handling and rapid identification of an operated fuse. Its robust ceramic construction and high interrupting capacity make it ideal for demanding industrial environments, motor control centres and power distribution systems.
With a rated current of 1250 A, a 500 V AC rating and a high 120 kA breaking capacity, the NH4AM50V1250-8 provides dependable short-circuit protection for motors, motor starters and industrial control equipment when used alongside suitable overload protection devices.
Key Advantages
- Designed specifically for motor circuit short-circuit protection.
- 1250 A rated current for high-power industrial applications.
- 500 V AC rated voltage.
- aM operating characteristic optimised for motor protection.
- 120 kA breaking capacity for demanding fault conditions.
- Top indicator enables quick fuse status identification.
- Live gripping lugs simplify installation and replacement.
- Current-limiting design helps reduce equipment damage during faults.
Key Features
- Mersen NH aM motor protection fuse series.
- NH4 DIN fuse size.
- 1250 A rated current.
- 500 V AC rated voltage.
- 120 kA AC breaking capacity.
- aM partial-range protection characteristic.
- Top operating indicator.
- Live gripping lugs.
- Silver-plated copper blade terminals.
- Ceramic insulating body.
- Clip mounting in compatible NH fuse bases.
- RoHS compliant.
Reliable Short-Circuit Protection for Motor Circuits
The Mersen NH4AM50V1250-8 incorporates an aM operating characteristic, making it particularly suitable for protecting motors against short circuits. Unlike full-range fuse links, aM fuses are intended to work alongside thermal overload relays, allowing normal motor starting currents to pass without nuisance operation while providing rapid fault interruption during severe short-circuit conditions.
Its high current-limiting capability helps reduce thermal stress and electrodynamic forces throughout the electrical installation, improving the protection of motors, contactors, cables and associated switchgear.
Typical Applications
- Motor control centres (MCCs).
- Industrial motor protection.
- Heavy-duty machinery.
- Industrial switchboards.
- Pump and compressor installations.
- Manufacturing and process automation systems.
Technical Specifications
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| Fuse Indication | Visual indicator | |
|---|---|---|
| Current | 1250 A | |
| Voltage | 500 V | |
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Class | aM | |
| Manufacturer | Mersen | |
| Series | NH aM Fuse Links | |
| Model | NH4AM50V1250-8 | |
| Item number | V219668 | |
| EAN | 4086500032198 | |
| Product type | DIN NH motor protection fuse link | |
| Fuse characteristic | aM | |
| Fuse size | NH4 | |
| Rated current | 1250 A | |
| Rated voltage | 500 V AC | |
| Breaking capacity | 120 kA AC | |
| Indicator | Top indicator | |
| Gripping lugs | Live gripping lugs | |
| Terminal type | Plain blades | |
| Terminal material | Silver-plated copper | |
| Body material | Ceramic | |
| Body width | 100 mm | |
| Dimensions (L × W × H) | Approx. 200 × 100 × 117 mm | |
| Weight | Approx. 2.18 kg | |
| Power dissipation at rated current | 110 W | |
| Mounting | Clip mounting in NH fuse base | |
| RoHS compliant | Yes | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH4AM50V1250-8 used for?
This fuse link is designed to provide short-circuit protection for industrial motor circuits and associated electrical equipment.
What is the current rating of this fuse?
The NH4AM50V1250-8 has a rated current of 1250 A.
What does the aM fuse characteristic mean?
The aM characteristic provides partial-range protection for motor circuits, protecting against short circuits while allowing normal motor starting currents. It should be used together with suitable overload protection.
What is the rated voltage?
This fuse is rated for operation on 500 V AC electrical systems.
What breaking capacity does the fuse provide?
The fuse offers a high AC breaking capacity of 120 kA, making it suitable for demanding industrial applications.
Trusted for Industrial Motor Protection
Mersen NH aM fuse links are widely specified by electrical engineers, OEM machine builders and industrial maintenance teams for dependable motor circuit protection, high fault interruption capability and long-term reliability in demanding industrial environments.
