NH250-690
250A 690V gG industrial fuse for motor protection and power distribution with 100kA breaking capacity.
Product Overview
Description
The NH250-690 is a standard industrial fuse for motor protection and power distribution applications.
With 690V rating and gG characteristic, this fuse provides full-range protection for industrial circuits.
The 100kA breaking capacity handles severe fault currents in industrial power systems.
Product Series
NH
Primary Application
Motor protection
Key Features
- 690V rating for industrial applications
- 100kA breaking capacity
- gG full-range protection
- Standard NH size for easy installation
- Visual indicator for blown fuse detection
- IEC and DIN compliant
Specifications
| Voltage Rating | 690V AC |
|---|---|
| Current Rating | 250A |
| Breaking Capacity | 100kA @ 690V |
| Size | NH2 |
| Mounting | NH fuse switch or base |
| Operating Temperature | -40°C to +85°C |
| Time-Current | gG general purpose |
| Standards | IEC 60269-1, DIN 43620 |
Applications
Motor protection
Motor drive and control systems
Power distribution
Electronic system design
Control circuits
Industrial automation and control
Transformer protection
Electronic system design
Capacitor protection
Electronic system design
General industrial
Industrial automation and control
FAE Expert Insights
"The NH series is the workhorse of industrial fuse protection. I've specified NH fuses for countless industrial projects over 20 years. The standard sizes make replacement easy - any manufacturer's NH2 fuse fits in any NH2 holder. For motor protection, remember that gG fuses provide overload protection while aM fuses only protect against short-circuits. I typically recommend gG for general circuits and aM for large motors with separate overload relays. The visual indicator is helpful for maintenance - you can see if a fuse has blown without removing it."
Reliable industrial protection with standard NH mounting for easy maintenance
— Robert Wang, BeiLuo
Frequently Asked Questions
Can NH fuses from different manufacturers be interchanged?
Yes, NH fuses are standardized per DIN 43620 and IEC 60269-1. Any manufacturer's NH2 fuse will fit in any NH2 holder. However, electrical characteristics may vary slightly between manufacturers. For critical applications, use fuses from the same manufacturer throughout the system for consistent performance.
NH fuses are interchangeable. Use same manufacturer for consistent performance in critical systems.