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MERSEN FUSE NH 4 630A 690V AM NH4AM69V630-8
Mersen NH4AM69V630-8 DIN NH4 aM fuse-link rated at 630 A and 690 V AC, featuring a 120 kA breaking capacity, top indicator and live gripping lugs for industrial motor short-circuit protection.
£109.67
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.
Technical Specifications
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| Fuse Indication | Visual indicator | |
|---|---|---|
| Current | 630 A | |
| Voltage | 690 V | |
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Class | aM | |
| Manufacturer | Mersen | |
| Series | NH aM 690 V AC Fuse-Links | |
| Model | NH4AM69V630-8 | |
| Manufacturer part number | S227992 | |
| Product type | DIN NH aM fuse-link | |
| Rated current | 630 A | |
| Rated operating voltage | 690 V AC | |
| Maximum AC breaking capacity | 120 kA | |
| Fuse size | NH4 | |
| Operating class | aM | |
| Current type | AC | |
| Indicator | Top indicator | |
| Gripping lugs | Live gripping lugs | |
| Mounting type | Clip mounting | |
| Body width | 100 mm | |
| EAN / UPC | 8430399027777 | |
| RoHS compliant | Yes | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH4AM69V630-8 used for?
This fuse-link is used to provide short-circuit protection for high-current industrial motors, machinery and associated electrical equipment.
What is the rated current of this fuse-link?
The Mersen NH4AM69V630-8 has a rated current of 630 A.
What operating voltage does the fuse support?
The fuse-link is rated for use in electrical systems operating at up to 690 V AC.
Does an aM fuse-link provide overload protection?
No. An aM fuse-link provides partial-range short-circuit protection and must be combined with a separate device that provides suitable overload protection.
What is the breaking capacity of the NH4AM69V630-8?
The fuse-link has a maximum AC breaking capacity of 120 kA, allowing it to interrupt substantial prospective fault currents.
Trusted for High-Power Industrial Protection
Mersen NH aM fuse-links are widely used by panel builders, electrical engineers and industrial maintenance teams to provide dependable short-circuit protection for motors and high-power machinery.
