MERSEN FUSE MB4a 1250A 3P 1.000.090 1.000.090

Why Choose the NH Fuse-Switch Disconnector MULTIBLOC® Size 4a 1250A?

The NH fuse-switch disconnector MULTIBLOC® Size 4a 1250A offers robust and reliable 1x3-pole switching for high-capacity electrical distribution and industrial power systems. Engineered for demanding applications, it ensures secure bottom fitting/panel connection with strong Screw M16 terminals, supporting efficient installation and long-term service.

This unit is designed to facilitate safe and rapid fuse changes while maintaining maximum electrical safety and operational continuity. Its durable construction and precise switching capabilities make it ideal for critical load protection and isolation in modern electrical infrastructures.

Product Code: W1023082

Key Benefits

• High current rating of 1250 A suitable for heavy-duty industrial applications.
• Reliable 1x3-pole switching ensures comprehensive circuit isolation.
• Robust bottom fitting/panel connection with Screw M16 terminals for secure installation.
• Designed for safe and quick fuse replacement to minimise downtime.
• Complies with RoHS standards, ensuring environmental safety.
• Durable construction with high rated impulse withstand voltage (8 kV) and short circuit withstand capacity (50 kA).

Compatibility

This fuse-switch disconnector is compatible with NH fuse size 4a and designed for use in IEC fuse switch disconnector systems. It supports both AC and DC utilization categories when used with solid links, making it suitable for integration into a wide range of industrial electrical distribution setups.

Applications

• Industrial power distribution panels requiring high-capacity circuit protection.
• Electrical installations needing secure and rapid fuse switching and isolation.
• Critical load protection in manufacturing plants and heavy machinery.
• Renewable energy systems requiring reliable disconnection and protection.
• Infrastructure projects with demanding electrical safety and operational continuity requirements.

Technical Specifications

• Item number: W1023082
• Catalogue No: 1.000.090
• Description: NH fuse-switch disconnector MULTIBLOC® Size 4a 1250A 1x3-Pole switching Bottom Fitting/panel Connection Screw M16
• EAN/UPC Code: 4027597028756
• Frequency (Hz): 50 ... 60 Hz
• Rated voltage AC IEC: 400 V
• Ampere Rating: 1250 A
• Utilization Category: AC 22 B @ Ue = AC 400 V; Ie = 1250 A DC 20 B @ Ue = DC 1000 V; Ie = 1250 A (with solid links)
• Switchability: 1x3-pole switching
• RoHS Compliant: Yes
• AC or DC: AC
• Fuse Size: 4a
• Design Details: triple pole switching
• Number of Poles: 3-Pole
• Degree of Pollution: 3
• Rated Impulse Withstand Voltage: 8 kV
• Rated Insulation Voltage: 800 V
• Rated SC Withstand: 50 kA / 1 s
• Max Power dissipation of Fuse Links Pn: 115 W
• Max Power dissipation of Solid Links Pn: 42 W
• Power Dissipation by Ith without Fuse-Links: 180 W
• Power Dissipation by Ith without Solid Links: 180 W
• Rated short circuit making capacity with solid links Icm: 100 kA
• Installation Mounting: Bottom Fitting/panel
• Product Width: 378 mm
• Product Length: 233 mm
• Product Height: 330 mm
• Sell Pack Quantity: 1 EA
• Sell Pack Weight: 12.5 kg
• Sell Pack Width: 410 mm
• Sell Pack Length: 415 mm
• Sell Pack Height: 270 mm
• Product group: IEC Fuse Switch Disconnectors
• Conventional Free Air thermal Current With Fuse-Links Ith: 1250 A
• Product Weight: 12.5 kg
• Conventional Free Air thermal Current - Solid Links: 1500 A

Common Search Terms

NH fuse switch disconnector, MULTIBLOC Size 4a, 1250 amp fuse switch, 3-pole fuse switch, IEC fuse switch disconnector, industrial fuse switch, bottom fitting fuse switch, screw M16 terminal fuse switch, high current fuse switch, electrical distribution fuse switch.