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MERSEN FUSE NH 3 425A 500V AM NH3AM50V425
Mersen NH3AM50V425 DIN NH3 aM fuse-link rated at 425 A and 500 V AC, featuring a 120 kA breaking capacity, live gripping lugs and a double indicator for industrial motor short-circuit protection.
£32.49
Why Choose the Mersen NH3AM50V425 NH Fuse-Link?
The Mersen NH3AM50V425 is a high-capacity DIN NH aM fuse-link designed to provide reliable short-circuit protection for powerful industrial motors and associated electrical equipment. Manufactured by Mersen, this NH3 size fuse-link delivers strong current-limiting performance for demanding motor feeders, machinery and low voltage distribution systems.
As part of the established Mersen NH aM 500 V AC fuse-link series, the NH3AM50V425 features live gripping lugs and a double indicator. These features support professional fuse handling and allow maintenance personnel to identify an operated fuse-link quickly, helping reduce inspection time and equipment downtime.
With a rated current of 425 A, a rated operating voltage of 500 V AC and a maximum breaking capacity of 120 kA AC, the NH3AM50V425 is suitable for high-power motor circuits requiring dependable short-circuit protection alongside a correctly selected overload protection device.
Key Advantages
- High-capacity motor circuit fuse-link for industrial applications.
- 425 A rated current suitable for powerful motors and machinery.
- 500 V AC rated voltage for industrial electrical systems.
- 120 kA AC breaking capacity for substantial prospective fault currents.
- Strong current-limiting performance helps reduce equipment damage.
- Double indicator enables rapid identification of an operated fuse-link.
- Live gripping lugs support handling with an appropriate NH fuse replacement device.
Key Features
- Mersen NH aM 500 V AC fuse-link series.
- 425 A rated current.
- 500 V AC rated operating voltage.
- 120 kA AC maximum breaking capacity.
- DIN NH3 size construction.
- aM partial-range operating characteristic.
- Double visual indicator.
- Live gripping lugs.
- Silver-plated copper blade contacts.
- Durable ceramic insulating body.
Reliable Short-Circuit Protection for High-Power Motors
The Mersen NH3AM50V425 is engineered to interrupt damaging short-circuit currents while accommodating the temporary inrush currents associated with motor starting. Its aM operating characteristic provides partial-range protection and is specifically intended for motor circuits where reliable short-circuit interruption is required.
Because an aM fuse-link does not provide complete overload protection, it must be used with an appropriate overload relay, motor protection circuit breaker or equivalent protective device. When correctly coordinated, this combination provides effective protection for motors, contactors, cables and associated control equipment.
Typical Applications
- High-power industrial motor circuits.
- Motor control centres and motor feeders.
- Industrial pumps, fans and compressors.
- Heavy manufacturing machinery.
- Processing and production equipment.
- Industrial switchboards and control panels.
Technical Specifications
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| Fuse Indication | Dual indicator | |
|---|---|---|
| Current | 425 A | |
| Voltage | 500 V | |
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH3 | |
| Fuse Class | aM | |
| Manufacturer | Mersen | |
| Series | NH aM 500 V AC Fuse-Links | |
| Model | NH3AM50V425 | |
| Manufacturer item number | S232523 | |
| Product type | DIN NH aM fuse-link | |
| Rated current | 425 A | |
| Rated voltage | 500 V AC | |
| Maximum breaking capacity | 120 kA AC | |
| Fuse size | NH3 | |
| Operating class | aM | |
| Current type | AC | |
| Indicator | Double indicator | |
| Gripping lugs | Live gripping lugs | |
| Mounting type | Clip mounting | |
| Terminal type | Plain blades | |
| Terminal material | Silver-plated copper | |
| Body material | Ceramic | |
| Body width | 71.9 mm | |
| Approximate dimensions (L × W × H) | 150.1 × 71.9 × 88.9 mm | |
| Power dissipation at rated current | 29.1 W | |
| Approximate weight | 1.05 kg | |
| EAN / UPC | 8430399026923 | |
| RoHS compliant | Yes | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH3AM50V425 used for?
It is an NH3 aM fuse-link designed to provide short-circuit protection for high-current industrial motors, machinery and associated electrical equipment.
What is the rated current of this fuse-link?
The Mersen NH3AM50V425 has a rated current of 425 A.
What voltage is this fuse designed for?
The fuse-link is rated for operation on industrial electrical systems up to 500 V AC.
Does an aM fuse-link provide overload protection?
No. An aM fuse-link provides partial-range short-circuit protection and must be combined with a suitable separate overload protection device.
What is the breaking capacity of the NH3AM50V425?
The fuse-link has a maximum AC breaking capacity of 120 kA, enabling it to interrupt substantial prospective fault currents.
Trusted for High-Power Motor Protection
Mersen NH aM fuse-links are widely used by panel builders, electrical engineers and industrial maintenance teams to provide dependable short-circuit protection for motors, machinery and high-current electrical systems.
