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MERSEN FUSE NH 4 800A 500V AM NH4AM50V800-8
Mersen NH4AM50V800-8 DIN NH4 aM fuse link rated at 800 A and 500 V AC with a 120 kA breaking capacity for industrial motor short-circuit protection.
£104.98
Why Choose the Mersen NH4AM50V800-8 Motor Protection Fuse Link?
The Mersen NH4AM50V800-8 is a heavy-duty DIN NH aM fuse link engineered to provide dependable short-circuit protection for motor circuits and industrial electrical equipment. Manufactured by Mersen, this NH4 fuse link is specifically designed to withstand the high inrush currents associated with motor starting while delivering rapid interruption of high fault currents.
As part of the proven Mersen NH aM 500 V AC fuse series, the NH4AM50V800-8 features live gripping lugs and a top operating indicator, enabling safer handling and quick identification of an operated fuse. Its ceramic body and silver-plated copper blade terminals ensure excellent mechanical strength, electrical conductivity and long service life in demanding industrial environments.
With a rated current of 800 A, a 500 V AC operating voltage and a high 120 kA breaking capacity, this fuse link is ideally suited to motor control centres, industrial switchboards and heavy-duty machinery requiring reliable motor circuit protection.
Key Advantages
- Designed specifically for motor circuit short-circuit protection.
- 800 A rated current for demanding industrial applications.
- 500 V AC rated voltage for low-voltage power systems.
- aM fuse characteristic optimised for motor protection.
- 120 kA AC breaking capacity for high fault current interruption.
- Top indicator provides rapid fuse status identification.
- Live gripping lugs support safe fuse replacement.
- Current-limiting design helps minimise equipment damage during faults.
Key Features
- Mersen NH aM motor protection fuse series.
- NH4 DIN fuse size.
- 800 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 Industrial Motors
The Mersen NH4AM50V800-8 incorporates an aM operating characteristic developed specifically for motor applications. It allows the high starting currents of electric motors to pass without nuisance operation while providing rapid protection against damaging short-circuit faults. As with all aM fuse links, overload protection should be provided by an appropriate thermal overload relay or motor protection device.
Its high current-limiting capability helps reduce thermal and mechanical stress throughout the electrical installation, improving the protection of motors, contactors, cables and associated switchgear while reducing downtime following electrical faults.
Typical Applications
- Motor control centres (MCCs).
- Industrial motor protection.
- Heavy-duty manufacturing equipment.
- Industrial switchboards.
- Pumps, compressors and conveyors.
- Process automation systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Visual indicator | |
|---|---|---|
| Current | 800 A | |
| Voltage | 500 V | |
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Class | aM | |
| Manufacturer | Mersen | |
| Series | NH aM Fuse Links | |
| Model | NH4AM50V800-8 | |
| Item number | V222865 | |
| EAN | 4086500032402 | |
| Product type | DIN NH motor protection fuse link | |
| Fuse characteristic | aM | |
| Fuse size | NH4 | |
| Rated current | 800 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 | 65 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 NH4AM50V800-8 used for?
This fuse link provides short-circuit protection for industrial motor circuits and associated electrical equipment.
What is the rated current of this fuse?
The NH4AM50V800-8 has a rated current of 800 A.
What does the aM fuse characteristic mean?
The aM characteristic is designed for motor protection, allowing motor starting currents while providing short-circuit protection. It should always be used alongside suitable overload protection.
What is the rated voltage?
This fuse link is rated for operation on 500 V AC electrical systems.
What breaking capacity does the fuse provide?
The NH4AM50V800-8 has a high AC breaking capacity of 120 kA, making it suitable for demanding industrial installations.
Trusted for Industrial Motor Protection
Mersen NH aM fuse links are trusted by electrical engineers, OEM machine builders and industrial maintenance professionals for dependable motor circuit protection, excellent fault interruption capability and long-term reliability in demanding industrial environments.
