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.
