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MERSEN FUSE NH 2 250A 690V AM NH2AM69V250
Mersen NH2AM69V250 NH2 size aM fuse link rated at 250 A and 690 V AC, designed to provide current-limiting short-circuit protection for industrial motors and electrical equipment.
£18.49
Why Choose the Mersen NH2AM69V250 NH Fuse Link?
The Mersen NH2AM69V250 is a high-performance NH2 size aM fuse link designed to provide dependable short-circuit protection for industrial motors, motor starters and heavy-duty electrical equipment. Rated at 250 A and 690 V AC, it is specifically engineered for motor circuits where high starting currents must be accommodated without unnecessary fuse operation.
Its aM operating characteristic is intended exclusively for motor circuit protection. The fuse tolerates the temporary inrush currents generated during motor start-up while rapidly interrupting dangerous short-circuit currents. As an aM fuse provides partial-range protection, it should always be used alongside a correctly selected overload relay or other suitable overload protection equipment.
The NH2AM69V250 features a durable ceramic body, silver-plated blade contacts, live gripping tags and an integrated double indicator for quick identification of an operated fuse. Its standard NH2 format with a 52 mm body width enables installation in compatible NH fuse bases and switch disconnectors used throughout industrial control systems.
Key Advantages
- Purpose-designed aM short-circuit protection for motor circuits.
- 250 A rated current for industrial motors and machinery.
- 690 V AC operating voltage.
- 80 kA breaking capacity for demanding industrial installations.
- Double indicator enables rapid identification of an operated fuse.
- Standard NH2 construction for compatible industrial switchgear.
Key Features
- Mersen NH aM industrial fuse-link range.
- NH2 fuse size.
- 250 A rated current.
- 690 V AC rated voltage.
- aM partial-range motor protection characteristic.
- 80 kA AC breaking capacity.
- Integrated double fuse indicator.
- Live gripping tags for safe handling.
- Silver-plated copper blade contacts.
- Robust ceramic insulating body.
Reliable Short-Circuit Protection for Motor Circuits
The Mersen NH2AM69V250 is designed to protect industrial motors and associated equipment by rapidly interrupting high fault currents while allowing normal motor starting currents to pass. Its current-limiting performance helps reduce thermal and mechanical stress on motors, contactors, cables and switchgear, improving overall system reliability.
As an aM fuse link, the NH2AM69V250 does not provide complete overload protection. It must be coordinated with a suitable thermal or electronic overload relay. Installation and replacement should only be carried out by qualified personnel using approved NH fuse handling equipment and appropriate personal protective equipment.
Typical Applications
- Industrial motor starters.
- Motor control centres.
- Pumps and compressors.
- Fans and ventilation systems.
- Conveyor and material handling equipment.
- Industrial machinery and automation systems.
Technical Specifications
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| Current | 250 A | |
|---|---|---|
| Voltage | 690 V | |
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH2 | |
| Fuse Class | aM | |
| Manufacturer | Mersen | |
| Series | NH Fuse Links aM 690 V AC | |
| Model | NH2AM69V250 | |
| Manufacturer item number | X227973 | |
| Product type | NH motor-protection fuse link | |
| Fuse size | NH2 | |
| Utilisation category | aM | |
| Rated current | 250 A | |
| Rated voltage | 690 V AC | |
| Current type | AC | |
| Maximum AC breaking capacity | 80 kA | |
| Protection range | Partial-range short-circuit protection | |
| Indicator type | Double indicator | |
| Gripping tags | Live gripping tags | |
| Terminal material | Silver-plated copper | |
| Terminal type | Plain blades | |
| Body material | Ceramic | |
| Body width | 52 mm | |
| Dimensions (L × W × H) | 150 × 52 × 74 mm | |
| Weight | approximately 0.64 kg | |
| Power dissipation | 16.8 W | |
| EAN | 8430399025285 | |
| Compliance | RoHS compliant | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH2AM69V250 used for?
This fuse link provides short-circuit protection for motors, motor starters and associated industrial electrical equipment.
What is the current rating of the NH2AM69V250?
The Mersen NH2AM69V250 has a rated current of 250 A.
What voltage is this fuse rated for?
The NH2AM69V250 is rated for operation at up to 690 V AC.
What does the aM fuse classification mean?
The aM classification identifies a partial-range fuse designed to protect motor circuits against short circuits while tolerating normal motor starting currents.
Does this fuse provide overload protection?
No. The aM fuse provides short-circuit protection only and must be used with a suitable overload relay.
Trusted Motor Circuit Protection
Mersen NH aM fuse links are widely trusted by electrical engineers, panel builders and industrial maintenance teams to provide dependable short-circuit protection for industrial motors, motor control equipment and automation systems.
