Eaton Bussmann NH 400 V Fuses – Reliable Low-Voltage Protection up to 1250 A

1. Overview – Trusted NH Fuse Technology for 400 V Applications

Eaton Bussmann NH 400 V fuses provide reliable circuit protection for industrial and commercial low-voltage systems.
Engineered to comply with IEC 60269-1, IEC 60269-2, and VDE 0636-2, these fuses deliver safe, efficient performance in distribution panels, switchgear, and power management systems.

The NH 400 V range covers current ratings from 2 A to 1250 A and is available in the gG and aM operating classes.
The fuses feature a dual-indicator design for quick status identification and are compatible with all standard NH bases according to DIN 43620.

Designed for demanding low-voltage environments, Bussmann NH 400 V fuses combine precision, safety, and proven reliability.

2. Technical Features & Product Highlights

Rated Electrical Data

• Rated voltage: 400 V AC

• Rated current: 2 A – 1250 A

• Breaking capacity: up to 120 kA

• Operating class: gG / aM

Construction & Safety Features

• Dual indication system: visible from top and front for fast fault identification

• High-rupturing capacity: ensures circuit isolation even under severe fault conditions

• Low power dissipation: supports energy efficiency in enclosed panels

• Optional insulated metal grip lugs (IMGL): enhanced operator safety during replacement

• Silver-plated contacts: low resistance and long-term durability

Standards & Approvals

• IEC 60269-1 / -2

• VDE 0636-2

• DIN 43620 (mounting compatibility)

3. Typical Applications

Eaton Bussmann NH 400 V fuses are ideal for:

• Low-voltage distribution boards and switchgear assemblies

• General power distribution systems up to 400 V

• Motor and transformer protection (aM class)

• Building and facility electrical installations

• UPS, backup power, and energy management systems

Whether used in new installations or retrofit projects, the Bussmann NH 400 V series provides consistent, safe protection against overloads and short circuits.

4. Advantages of Eaton Bussmann NH 400 V Fuses

• Wide current range – from 2 A to 1250 A for flexible applications

• High breaking capacity – reliable isolation even under heavy fault conditions

• Clear visual indication – quick maintenance and reduced downtime

• Compact, standardized design – fits common NH bases and disconnectors

• Tested to international standards – proven safety and global acceptance

• Backed by Eaton Bussmann engineering – decades of expertise in fuse protection

5. Eaton Bussmann NH Fuse Types (400 V Range)

Each fuse is available in standard and IMGL (insulated grip lug) versions for enhanced handling safety.

6. Your Advantages with Casadaa Distribution

• Extensive stock of Eaton Bussmann NH 400 V fuses

• Fast delivery across Europe and international export options

• Expert technical advice for selecting the right fuse type

• Support for system design, replacement, and cross-reference solutions

• Access to datasheets, technical drawings, and certifications

Casadaa Distribution is your reliable partner for Eaton Bussmann NH fuse systems and accessories.

7. Frequently Asked Questions

Q: What is the difference between gG and aM NH fuses?
A: gG fuses protect cables and general circuits from both overloads and short circuits. aM fuses provide short-circuit protection only and are used in motor and transformer applications.

Q: Can Eaton Bussmann NH 400 V fuses be used in standard NH bases?
A: Yes, all 400 V fuses are fully compatible with NH bases conforming to DIN 43620.

Q: Are there fuses with built-in indicators?
A: Yes, all standard NH 400 V fuses feature dual visual indicators and optional microswitch signaling.

Q: What is the breaking capacity of NH 400 V fuses?
A: Up to 120 kA, depending on the fuse size and rating.