Eaton Bussmann NH 690 V Fuses – High-Voltage Low-Voltage Protection up to 120 kA

1. Overview – Premium NH-Style Fuse Links for 690 V Systems

The Eaton Bussmann NH 690 V fuse series provides reliable and robust protection for power systems rated up to 690 V AC. Designed for industrial low-voltage applications with high-power demands, these fuses deliver dependable protection against overloads and short-circuits in general-purpose gG/gL utilization class.

Each fuse features a high interrupting rating up to 120 kA, a dual-indicator system for quick fault detection, and full compatibility with standard NH fuse bases (DIN 43620).

2. Technical Specifications & Key Features

Electrical Ratings

• Rated voltage: 690 V AC

• Rated current range: 2 A to 800 A (depending on size)

• Breaking capacity: up to 120 kA

Utilization Class & Construction

• Utilization class: gG / gL – general-purpose protection for cables and equipment

• Construction: NH-style square-body fuse links with knife-blade contacts

• Indicators: Dual visual indicator (front and top) for quick blown-fuse identification

• Optional accessories: Microswitches and insulated metal gripping lugs available

Standards & Compliance

• Conforms to IEC 60269-1 / -2, VDE 0636, and DIN 43620

• Suitable for industrial and utility low-voltage distribution systems

3. Typical Applications

Eaton Bussmann NH 690 V fuses are ideal for:

• Low-voltage power distribution systems up to 690 V AC

• Cable and equipment protection in industrial plants

• Switchgear and distribution boards

• Busbar and feeder protection

• Retrofit or upgrade projects requiring higher voltage-rated fuses

4. Advantages & Benefits

• High voltage capability (690 V) for modern power systems

• Wide current range from 2 A to 800 A for full design flexibility

• High breaking capacity (120 kA) ensures superior short-circuit protection

• Dual indicator for fast and reliable fault detection

• Full NH system compatibility with existing holders and bases

• Proven Eaton Bussmann reliability trusted in industrial and infrastructure applications

5. Product Range Overview (NH 690 V Series)

6. Benefits of Choosing Casadaa Distribution

• Wide range of Eaton Bussmann NH 690 V fuse links in stock (sizes 000–4)

• Fast delivery across Europe

• Expert support for fuse selection and coordination studies

• Access to datasheets, technical drawings, and compliance information

• Replacement solutions for older NH fuse installations

7. Frequently Asked Questions (FAQ)

Q: What does “690 V” mean in an NH fuse?
A: It indicates that the fuse can safely operate in circuits up to 690 volts AC, suitable for high-voltage low-voltage networks.

Q: Are these fuses compatible with standard NH fuse holders?
A: Yes, Eaton Bussmann NH 690 V fuses fit all standard DIN 43620 holders used for NH fuses.

Q: What is the difference between gG and gL?
A: Both indicate full-range protection (overload and short-circuit) according to IEC 60269.

Q: What is the breaking capacity of these fuses?
A: Up to 120 kA at 690 V AC, depending on the fuse size and current rating.