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MERSEN FUSE NH 4A 1250A 500V GG MID IND NH4AGG50V1250
Mersen NH4AGG50V1250 NH4a size gG fuse link rated at 1250 A, 500 V AC and 250 V DC for full-range protection of industrial cables, switchgear and electrical equipment.
£263.09
Why Choose the Mersen NH4AGG50V1250 NH Fuse Link?
The Mersen NH4AGG50V1250 is a heavy-duty NH4a size gG fuse link designed to provide full-range protection for low-voltage power distribution systems, industrial switchgear and electrical installations. Rated at 1250 A and 500 V AC, this high rupturing capacity fuse offers reliable protection against both overloads and short-circuit faults in demanding industrial environments.
Its gG operating characteristic provides complete protection for cables and electrical equipment across the entire operating range. The fuse responds to prolonged overloads while rapidly interrupting high fault currents, helping protect switchgear, busbars and electrical infrastructure from thermal and mechanical damage.
The NH4AGG50V1250 features a robust ceramic body, silver-plated blade contacts, live gripping tags and an integrated centre indicator that provides a clear visual indication when the fuse has operated. Designed to IEC and DIN NH standards, it is intended for installation in compatible NH4a fuse bases and switch-fuse disconnectors.
Key Advantages
- Full-range gG protection against overloads and short circuits.
- 1250 A rated current for high-capacity industrial installations.
- 500 V AC and 250 V DC ratings.
- 120 kA breaking capacity for demanding fault conditions.
- Integrated centre indicator for rapid fuse identification.
- Standard NH4a construction for compatible industrial switchgear.
Key Features
- Mersen NH gG fuse-link series.
- NH4a fuse size.
- 1250 A rated current.
- 500 V AC rated voltage.
- 250 V DC rated voltage.
- gG full-range utilisation category.
- 120 kA AC breaking capacity.
- Integrated centre fuse indicator.
- Live gripping tags for safe replacement.
- Silver-plated blade contacts with ceramic insulating body.
Reliable Protection for High-Current Power Distribution
The Mersen NH4AGG50V1250 is designed to protect industrial power distribution systems by safely interrupting overloads and severe short-circuit currents before damage occurs. Its high breaking capacity makes it suitable for installations with high prospective fault currents, helping improve electrical safety and equipment reliability.
The fuse should be installed in a compatible NH4a fuse base or switch disconnector and replaced only by qualified personnel using an approved NH fuse puller and appropriate personal protective equipment.
Typical Applications
- Industrial power distribution systems.
- Main electrical switchboards.
- High-current distribution panels.
- Busbar and feeder protection.
- Manufacturing and processing facilities.
- Commercial and industrial electrical infrastructure.
Technical Specifications
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| Current | 1250 A | |
|---|---|---|
| Voltage | 500 V | |
| Device Type | Accessory | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH4a | |
| Fuse Class | gG | |
| Manufacturer | Mersen | |
| Series | NH Fuse-links gG 500 VAC | |
| Model | NH4AGG50V1250 | |
| Manufacturer item number | X1054294 | |
| Product type | NH high rupturing capacity fuse link | |
| Fuse size | NH4a | |
| Utilisation category | gG | |
| Rated current | 1250 A | |
| Rated AC voltage | 500 V AC | |
| Rated DC voltage | 250 V DC | |
| Maximum AC breaking capacity | 120 kA | |
| Power dissipation | 90 W | |
| Body width | 100 mm | |
| Indicator type | Centre indicator | |
| Gripping tags | Live gripping tags | |
| Terminal type | NH blade contacts | |
| Body material | Ceramic | |
| Approximate weight | 2.58 kg | |
| EAN | 3605340588453 | |
| Compliance | RoHS compliant | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH4AGG50V1250 used for?
This fuse link provides full-range protection for industrial cables, switchgear and power distribution equipment against overloads and short-circuit faults.
What is the current rating of the NH4AGG50V1250?
The Mersen NH4AGG50V1250 has a rated current of 1250 A.
What voltage is this fuse rated for?
The fuse is rated for operation at up to 500 V AC and 250 V DC.
What does the gG fuse classification mean?
The gG classification identifies a full-range fuse that protects electrical cables and equipment against both overload currents and short-circuit faults.
What is the purpose of the centre indicator?
The integrated centre indicator provides a clear visual indication when the fuse has operated, allowing maintenance personnel to identify and replace the fuse quickly.
Trusted Industrial Circuit Protection
Mersen NH gG fuse links are widely specified by electrical engineers, panel builders and industrial maintenance teams to provide dependable protection for high-current power distribution systems and electrical installations.
