Why Choose the Mersen NH3GG69V425 NH Fuse-Link?
The Mersen NH3GG69V425 is a high-performance NH size 3 gG fuse-link designed to provide full-range protection against overload and short-circuit currents in demanding industrial electrical systems. Rated at 425 A and 690 V AC, it is suitable for protecting high-current cables, conductors, switchgear and power distribution equipment.
Its gG utilisation category provides comprehensive protection throughout the fuse-link's operating range. The NH3GG69V425 can interrupt currents from low-level overcurrents through to severe short-circuit faults, while its current-limiting characteristics help reduce the thermal and electrodynamic stress imposed on downstream equipment.
The fuse-link features a durable ceramic body, standard NH blade contacts, live gripping lugs and a convenient double indication system. Manufactured in the DIN NH3 format, it can be installed in compatible NH fuse bases and switch-fuse assemblies used in industrial power distribution installations.
Key Advantages
- Provides full-range overload and short-circuit protection.
- 425 A rated current for high-current industrial circuits.
- 690 V AC rating suitable for demanding power networks.
- 250 V DC rating supports compatible direct-current applications.
- Current-limiting performance helps reduce damaging fault energy.
- Double indication system enables convenient fuse status identification.
- Standard NH3 construction fits compatible industrial fuse equipment.
Key Features
- Mersen NH gG fuse-link series.
- NH3 fuse size.
- 425 A rated current.
- 690 V AC rated voltage.
- 250 V DC rated voltage.
- gG full-range operating characteristic.
- Double visual indication system.
- Live, non-isolated gripping lugs.
- Standard NH blade contacts.
- Robust ceramic insulating body.
- 71.9 mm body width.
Reliable Full-Range Protection for High-Current Circuits
The Mersen NH3GG69V425 protects cables and industrial equipment by interrupting both sustained overload currents and severe short-circuit faults. Its full-range gG characteristic allows it to act as the primary fuse protection device for correctly designed electrical circuits.
During high fault conditions, the fuse-link limits the peak current and energy passed to downstream equipment. This helps reduce damage to busbars, cables, switchgear and connected machinery while supporting safer and more reliable power distribution.
Typical Applications
- Industrial power distribution systems.
- Main switchboards and distribution panels.
- High-current cable and conductor protection.
- Industrial machinery and production equipment.
- Transformer secondary circuit protection.
- Switch-fuse and fuse-disconnector assemblies.
