Why Choose the Mersen NH3GG40V250 NH Fuse-Link?
The Mersen NH3GG40V250 is a high-performance DIN NH gG fuse-link designed to provide full-range protection against overload currents and short-circuit faults in low voltage electrical distribution systems. As part of the established Mersen NH gG 400 V AC fuse-link range, it provides dependable protection for cables, switchgear, distribution equipment and industrial electrical installations.
This NH3 fuse-link combines a robust ceramic insulating body with double visual indicators and live gripping lugs. The indication system allows maintenance personnel to identify an operated fuse quickly, while the standard blade-contact construction supports installation in compatible DIN NH fuse bases and fuse-switch disconnectors.
With a rated current of 250 A, a rated operating voltage of 400 V AC and a breaking capacity of 100 kA AC, the NH3GG40V250 is suitable for protecting industrial distribution circuits and electrical equipment. Its gG operating characteristic provides complete protection from sustained overload currents through to high-level short-circuit faults.
Key Advantages
- Full-range gG protection against overloads and short circuits.
- 250 A rated current for industrial distribution circuits.
- 400 V AC rated operating voltage.
- 100 kA AC breaking capacity for dependable fault interruption.
- Double indicators provide clear fuse operation status.
- Current-limiting performance helps reduce damage to downstream equipment.
Key Features
- Mersen NH gG fuse-link series.
- Catalogue number: NH3GG40V250.
- 250 A rated current.
- 400 V AC IEC rated voltage.
- DIN NH Size 3 construction.
- gG full-range operating characteristic.
- Double visual indication system.
- Live gripping lugs.
- Silver-plated copper blade terminals.
- Robust ceramic insulating body.
Reliable Protection for Industrial Power Distribution
The Mersen NH3GG40V250 provides complete protection across both overload and short-circuit operating regions. Its gG characteristic allows the fuse-link to protect cables, conductors, switchgear and general-purpose electrical equipment without requiring a separate short-circuit protection fuse.
Its current-limiting construction restricts the peak current and energy passed during a fault, helping reduce thermal and electrodynamic stress on connected equipment. The DIN NH format enables straightforward integration into compatible fuse bases, distribution panels and switch-disconnector assemblies.
Typical Applications
- Industrial power distribution systems.
- Low voltage switchboards.
- Cable and conductor protection.
- Distribution panels and feeder circuits.
- Motor control centres.
- OEM machinery and electrical assemblies.
