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MERSEN FUSE NH 3 400A 690V GG NH3GG69V400
Mersen NH3GG69V400 DIN NH size 3 gG fuse-link rated at 400 A, 690 V AC and 250 V DC with double indication and live gripping lugs for industrial low-voltage circuit protection.
£39.62
Why Choose the Mersen NH3GG69V400 NH Fuse-Link?
The Mersen NH3GG69V400 is a heavy-duty DIN NH size 3 gG fuse-link designed to provide dependable full-range protection for low-voltage power distribution systems, industrial switchgear and electrical installations. Rated at 400 A with a maximum operating voltage of 690 V AC and 250 V DC, it delivers reliable protection against overloads and short-circuit faults in demanding industrial environments.
Part of the trusted Mersen NH gG 690 V fuse-link range, the NH3GG69V400 features a ceramic insulating body, silver-plated blade contacts, live gripping lugs and a double indication system for rapid identification after fuse operation. Its high interrupting capacity and compliance with DIN NH standards make it ideal for protecting cables, busbars and critical electrical equipment.
Designed for installation in compatible NH fuse bases and switch-fuse disconnectors, the NH3GG69V400 offers reliable protection while maintaining compatibility with standard NH systems. Installation and replacement should only be carried out by qualified electrical professionals using approved NH fuse handling equipment.
Key Advantages
- General-purpose gG protection against overloads and short circuits.
- 400 A rated current for heavy-duty industrial distribution systems.
- 690 V AC / 250 V DC operating voltage.
- 120 kA AC breaking capacity for dependable fault interruption.
- Double indication system provides rapid fuse status identification.
- DIN NH size 3 construction for compatibility with standard NH fuse systems.
Key Features
- Mersen NH gG 690 V fuse-link series.
- DIN NH size 3.
- 400 A rated current.
- 690 V AC / 250 V DC rated voltage.
- General-purpose gG utilisation category.
- Double blown-fuse indication.
- Live, non-isolated gripping lugs.
- Silver-plated blade contacts.
- Ceramic insulating body.
- RoHS compliant construction.
Reliable Protection for Industrial Power Distribution
The Mersen NH3GG69V400 provides full-range protection by safely interrupting overload and short-circuit currents before damage can occur to cables, busbars, switchgear and connected electrical equipment. Its current-limiting design helps reduce thermal and mechanical stress throughout the electrical installation during fault conditions.
Manufactured in accordance with DIN NH standards, this fuse-link is compatible with standard NH fuse systems and should only be installed or replaced by qualified personnel using approved NH fuse handling equipment.
Typical Applications
- Industrial power distribution boards.
- Low-voltage switchgear assemblies.
- Cable and busbar protection.
- Main incoming electrical supplies.
- Switch-fuse disconnectors.
- Industrial manufacturing facilities.
- Commercial and utility electrical installations.
Technical Specifications
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| Fuse Indication | Dual indicator | |
|---|---|---|
| Current | 400 A | |
| Voltage | 690 V | |
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH3 | |
| Fuse Class | gG | |
| Manufacturer | Mersen | |
| Series | NH gG 690 V Fuse-Links | |
| Model | NH3GG69V400 | |
| Item number | D228508 | |
| Product type | NH low-voltage fuse-link | |
| Fuse characteristic | gG | |
| Fuse size | NH3 | |
| Rated current | 400 A | |
| Rated AC voltage | 690 V AC | |
| Rated DC voltage | 250 V DC | |
| Current type | AC / DC | |
| Breaking capacity | 120 kA AC | |
| Power dissipation | 34 W | |
| Indication system | Double indicator | |
| Gripping lugs | Live / non-isolated | |
| Body width | 71.9 mm | |
| Weight | Approx. 1.05 kg | |
| EAN | 8430399026657 | |
| Compliance | RoHS compliant | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH3GG69V400 used for?
This NH fuse-link protects industrial electrical distribution systems, cables and equipment against overloads and short-circuit faults.
What is the current rating of this fuse?
The NH3GG69V400 has a rated current of 400 A.
What voltage is this fuse designed for?
It is rated for operation at up to 690 V AC and 250 V DC.
What does the gG characteristic mean?
The gG utilisation category provides full-range protection against both overload and short-circuit currents for general-purpose low-voltage electrical circuits.
Does this fuse include a blown-fuse indicator?
Yes. The NH3GG69V400 incorporates a double indication system for quick visual identification when the fuse has operated.
Trusted by Electrical Professionals Worldwide
Mersen NH fuse-links are trusted by electrical engineers, panel builders and industrial maintenance teams worldwide for dependable low-voltage circuit protection, excellent current limitation and long-term operational reliability.
