Why Choose the Mersen NH4AM69V630-8 NH Fuse-Link?
The Mersen NH4AM69V630-8 is a high-performance DIN NH aM fuse-link designed to provide reliable short-circuit protection for high-power motor circuits and demanding industrial electrical installations. As part of the established Mersen NH aM fuse-link range, it combines strong current-limiting performance with low power losses to help protect motors, switchgear and associated equipment.
This industrial fuse-link features an NH4 body size, live gripping lugs and a top-mounted visual indicator. These features support straightforward installation, safe professional handling and rapid identification of an operated fuse during inspection and maintenance.
With a rated current of 630 A and a rated operating voltage of 690 V AC, the NH4AM69V630-8 is suitable for large industrial motors and high-current machinery circuits. Its aM operating characteristic provides partial-range protection against short circuits and must be combined with suitable overload protection.
Key Advantages
- High-capacity motor circuit fuse-link for industrial applications.
- 630 A rated current suitable for high-power equipment.
- 690 V AC rated voltage for industrial power systems.
- High 120 kA AC breaking capacity.
- Strong current-limiting performance helps reduce fault damage.
- Top indicator supports quick identification of an operated fuse-link.
- Live gripping lugs allow handling with an appropriate NH fuse replacement device.
Key Features
- Mersen NH aM 690 V AC fuse-link series.
- 630 A rated current.
- 690 V AC rated operating voltage.
- 120 kA AC maximum breaking capacity.
- DIN NH4 size construction.
- aM partial-range operating characteristic.
- Top-mounted fuse status indicator.
- Live gripping lugs.
- 100 mm body width.
- RoHS-compliant construction.
Reliable Short-Circuit Protection for High-Power Motors
The Mersen NH4AM69V630-8 is engineered to interrupt damaging short-circuit currents in large motor circuits. Its current-limiting design helps restrict the peak current and energy passed during a fault, reducing electrical and mechanical stress on downstream equipment.
As an aM partial-range fuse-link, it is intended specifically for short-circuit protection and does not provide complete overload protection. It should therefore be installed alongside a correctly selected overload relay, motor protection circuit breaker or equivalent protective device.
Typical Applications
- High-power industrial motor circuits.
- Motor control centres and motor feeders.
- Heavy manufacturing machinery.
- Industrial pumps, compressors and fans.
- Processing and production equipment.
- Low voltage switchboards and distribution panels.
