Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
MERSEN FUSE NH 3 450A 500V AM NH3AM50V450
Mersen NH3AM50V450 DIN NH3 aM motor fuse link rated at 450 A and 500 V AC with double indicator, live gripping lugs and 120 kA breaking capacity for industrial motor short-circuit protection.
£22.39
Why Choose the Mersen NH3AM50V450 Motor Fuse Link?
The Mersen NH3AM50V450 is a heavy-duty DIN NH aM fuse link specifically designed to provide reliable short-circuit protection for industrial motor circuits. Manufactured by Mersen, this NH Size 3 fuse link offers excellent current-limiting performance, helping safeguard motors, contactors, motor starters and associated electrical equipment against high fault currents while maintaining dependable operation in demanding industrial environments.
Featuring a 450 A rated current and a 500 V AC operating voltage, the NH3AM50V450 is engineered to withstand the high inrush currents associated with motor starting while rapidly interrupting severe short-circuit faults. Its aM operating class makes it ideal for motor protection systems used alongside an overload relay or motor protection circuit breaker.
Manufactured in the standard NH Size 3 format, the fuse incorporates blade contacts, live gripping lugs and a double operation indicator. Its durable ceramic construction, 120 kA AC breaking capacity and standardised dimensions make it suitable for industrial switchboards, motor control centres and low-voltage distribution systems.
Key Advantages
- Purpose-designed aM fuse link for industrial motor protection.
- 450 A rated current for high-power motor applications.
- 500 V AC rated voltage.
- High current-limiting performance helps reduce fault energy.
- Designed to withstand normal motor starting currents.
- Double indicator enables rapid visual confirmation of fuse operation.
- Live gripping lugs support safe replacement using approved NH fuse pullers.
Key Features
- Mersen NH fuse-links aM 500 VAC series.
- NH Size 3.
- 450 A rated current.
- 500 V AC rated voltage.
- Partial-range aM operating class.
- 120 kA AC breaking capacity.
- Double fuse operation indicator.
- Live gripping lugs.
- Blade contact construction.
- 71.9 mm body width.
Reliable Short-Circuit Protection for High-Power Motors
The Mersen NH3AM50V450 is designed to interrupt high fault currents while allowing the temporary inrush currents generated during normal motor starting. This helps minimise thermal and mechanical stress on motors, starters, conductors and switching equipment, improving reliability and reducing maintenance costs.
As an aM partial-range fuse, the NH3AM50V450 provides short-circuit protection only. It should always be coordinated with an appropriate overload relay or motor protection circuit breaker to provide complete motor circuit protection.
Typical Applications
- High-power motor starter circuits.
- Motor control centres.
- Industrial pumps and compressors.
- Heavy-duty conveyor systems.
- Manufacturing and processing machinery.
- Industrial switchboards and control panels.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Dual indicator | |
|---|---|---|
| Current | 450 A | |
| Voltage | 500 V | |
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH3 | |
| Fuse Class | aM | |
| Manufacturer | Mersen | |
| Series | NH Fuse-links aM 500 VAC | |
| Model | NH3AM50V450 | |
| Manufacturer item number | T232524 | |
| EAN / UPC | 8430399026930 | |
| Product type | DIN NH motor fuse link | |
| Fuse size | NH3 | |
| Rated current | 450 A | |
| Rated voltage | 500 V AC | |
| Operating class | aM | |
| Current type | AC | |
| Breaking capacity | 120 kA AC | |
| Power dissipation | 34 W | |
| Body width | 71.9 mm | |
| Product weight | Approx. 1.05 kg | |
| Indicator | Double indicator | |
| Gripping lugs | Live gripping lugs | |
| Contact type | Plain blade contacts | |
| Body material | Ceramic | |
| Compliance | IEC 60269 and RoHS compliant | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH3AM50V450 used for?
It provides short-circuit protection for industrial motor circuits, motor starters, contactors and associated electrical equipment.
What is the current rating of this fuse?
The Mersen NH3AM50V450 has a rated current of 450 A.
What voltage is the NH3AM50V450 rated for?
The fuse is designed for operation at up to 500 V AC.
What does the aM operating class mean?
The aM operating class identifies a partial-range motor fuse designed specifically for short-circuit protection. It must be used together with a suitable overload protection device.
Can this fuse provide complete motor protection?
No. The NH3AM50V450 provides short-circuit protection only and should always be coordinated with a suitable overload relay or motor protection circuit breaker.
Trusted for Industrial Motor Protection
Mersen NH aM fuse links are trusted by OEMs, panel builders and industrial maintenance professionals worldwide to deliver dependable short-circuit protection for motor circuits and high-power industrial machinery.
