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MERSEN FUSE NH 4A 800A 690V AM NH4AAM69V800-8
Mersen NH4AAM69V800-8 DIN NH4a aM motor protection fuse-link rated at 800 A and 690 V AC with a 120 kA breaking capacity, top indicator and live gripping tags.
£109.67
Why Choose the Mersen NH4AAM69V800-8 NH Motor Protection Fuse?
The Mersen NH4AAM69V800-8 is a heavy-duty DIN NH aM fuse-link engineered to provide reliable short-circuit protection for large motors, motor starters and industrial switching equipment. Rated at 800 A with a 690 V AC operating voltage, this NH Size 4a fuse-link is designed for demanding industrial power distribution and high-power motor control applications.
Manufactured by Mersen, the NH4AAM69V800-8 belongs to the company's NH aM fuse range and incorporates an aM utilisation category specifically developed for motor circuit protection. It accommodates the high inrush currents experienced during motor starting while providing rapid interruption of severe short-circuit faults.
Featuring live gripping tags, a top-mounted visual indicator and a robust ceramic construction with a 100 mm body width, this fuse-link delivers dependable protection for industrial switchboards, motor control centres, transformer installations and OEM power distribution equipment.
Key Advantages
- Designed specifically for motor circuit short-circuit protection.
- 800 A rated current for high-power industrial motors.
- 690 V AC operating voltage.
- aM operating characteristic tolerates normal motor starting currents.
- 120 kA AC breaking capacity for dependable fault interruption.
- Top-mounted visual indicator enables rapid fuse status identification.
Key Features
- Manufacturer: Mersen
- Model: NH4AAM69V800-8
- Product type: DIN NH motor protection fuse-link
- Fuse size: NH4a
- Rated current: 800 A
- Rated voltage: 690 V AC
- Operating category: aM
- Breaking capacity: 120 kA AC
- Top-mounted visual indicator.
- Live gripping tags.
- Body width: 100 mm
- NH blade-contact construction.
Reliable Protection for High-Power Motor Circuits
The Mersen NH4AAM69V800-8 has been engineered for demanding motor applications where high inrush currents occur during motor starting. Its aM operating characteristic allows these temporary currents to pass while rapidly interrupting severe short-circuit faults that could damage motors, contactors, switchgear and power distribution equipment.
As an aM fuse-link, the NH4AAM69V800-8 provides short-circuit protection only and should always be used in conjunction with an appropriate overload relay or motor protection device to achieve complete motor protection.
Typical Applications
- High-power motor control centres.
- Large industrial motors.
- Industrial switchboards.
- Heavy-duty manufacturing equipment.
- Mining and process industries.
- OEM power distribution equipment.
Technical Specifications
Tick the specs you need, then view products that match.
| Current | 800 A | |
|---|---|---|
| Voltage | 690 V | |
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH4a | |
| Fuse Class | aM | |
| Manufacturer | Mersen | |
| Series | NH Fuse-links aM 690 VAC | |
| Model | NH4AAM69V800-8 | |
| Manufacturer item number | A227999 | |
| Product type | DIN NH motor protection fuse-link | |
| Fuse size | NH4a | |
| Rated current | 800 A | |
| Rated operating voltage | 690 V AC | |
| Current type | AC | |
| Utilisation category | aM | |
| Maximum AC breaking capacity | 120 kA | |
| Indicator type | Top indicator | |
| Gripping tags | Live gripping tags | |
| Body width | 100 mm | |
| Power dissipation at rated current | 65 W | |
| Approximate weight | 2.2 kg | |
| EAN | 8430399027838 | |
| RoHS compliant | Yes | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH4AAM69V800-8 used for?
The NH4AAM69V800-8 provides short-circuit protection for high-power industrial motors, motor starters and associated switching equipment.
What is the rated current of this fuse?
The NH4AAM69V800-8 has a rated current of 800 A.
What voltage is this fuse designed for?
The fuse is rated for operation on systems up to 690 V AC.
What does the aM operating category mean?
The aM characteristic is intended for motor circuit protection. It allows normal motor starting currents while providing high-performance short-circuit protection and should be used alongside a suitable overload protection device.
What is the breaking capacity of the NH4AAM69V800-8?
The NH4AAM69V800-8 has a maximum AC breaking capacity of 120 kA.
Trusted for Industrial Motor Protection
Mersen NH motor protection fuse-links are trusted worldwide by electrical engineers, switchgear manufacturers and OEMs for dependable short-circuit protection of industrial motors and high-current power distribution systems.
