MERSEN FUSE MB1 250A 3P 1.000.831 1.000.831

Why Choose the NH Fuse-Switch Disconnector MULTIBLOC® Size 1 250A 3-Pole?

The NH fuse-switch disconnector MULTIBLOC® Size 1 250A 3-pole offers robust circuit protection and reliable isolation for demanding industrial applications. Designed for bottom fitting and panel mounting, it features secure screw M10 terminations for stable, low-resistance connections.

This unit ensures rapid and safe fuse replacement while maintaining IP protection and compliance with IEC standards. Its compact construction facilitates straightforward installation and integration into modern switchgear assemblies.

Technical Specifications

• Item number: T1023057
• Catalogue No: 1.000.831
• Description: NH fuse-switch disconnector MULTIBLOC® Size 1 250A 3-Pole switching Bottom Fitting/panel Connection Screw M10 elecmec mon.
• EAN/UPC Code: 4027597023454
• Frequency (Hz): 50 ... 60 Hz
• Rated voltage AC IEC: 690 V
• Ampere Rating: 250 A
• Utilization Category: AC 23 B @ Ue = AC 400 V; Ie = 250 A AC 22 B @ Ue = AC 500 V; Ie = 250 A AC 21 B @ Ue = AC 690 V; Ie = 200 A DC 21 B @ Ue = DC 440 V; Ie = 250 A
• Switchability: 3-pole switching
• RoHS Compliant: Yes
• AC or DC: AC
• Short Circuit Current Rating (SCCR): 80kA@Ue=AC 400 V;Ie=250 A / 80kA@Ue=AC 500 V;Ie=250 A / 80kA (1-,2-pole)@Ue=AC 690 V;Ie=200 A / 50kA (3-,4-pole)@Ue=AC 690 V;Ie=200 A
• Fuse Size: 1
• Design Details: with electromechanic fuse monitoring MZS installed (galvanic isolation)
• Number of Poles: 3-Pole
• Degree of Pollution: 3
• Rated Impulse Withstand Voltage: 12 kV
• Rated Insulation Voltage: 1000 V
• Rated SC Withstand: 8 kA / 1 s
• Max Power dissipation of Fuse Links Pn: 23 W
• Max Power dissipation of Solid Links Pn: 2.6 W
• Power Dissipation by Ith without Fuse-Links: 13 W
• Power Dissipation by Ith without Solid Links: 33 W
• Rated short circuit making capacity with solid links Icm: 8.2 kA
• Installation Mounting: Bottom Fitting/panel
• Product Width: 185 mm
• Product Length: 186.5 mm
• Product Height: 246 mm
• Sell Pack Quantity: 1 EA
• Sell Pack Weight: 3.13 kg
• Sell Pack Width: 208 mm
• Sell Pack Length: 262 mm
• Sell Pack Height: 185 mm
• Product group: IEC Fuse Switch Disconnectors
• Conventional Free Air thermal Current With Fuse-Links Ith: 250 A
• Product Weight: 3.13 kg
• Conventional Free Air thermal Current - Solid Links: 400 A

Product Code: T1023057

Key Benefits

• Robust circuit protection with reliable isolation for industrial environments.
• Secure screw M10 terminations ensure stable, low-resistance electrical connections.
• Compact design enables easy installation in switchgear panels.
• Rapid and safe fuse replacement reduces downtime and maintenance effort.
• Complies with IEC standards and offers high short circuit current ratings for safety.
• Equipped with electromechanic fuse monitoring (MZS) for enhanced operational safety.

Compatibility

This fuse-switch disconnector is compatible with NH Size 1 fuse links and designed for integration into IEC-compliant switchgear assemblies. It supports AC systems up to 690 V and is suitable for use with 3-pole switching configurations in industrial electrical installations.

Applications

• Industrial power distribution and control panels.
• Protection and isolation of electrical circuits in manufacturing plants.
• Switchgear assemblies requiring compact and reliable fuse-switch disconnectors.
• Maintenance and safety switching in electrical distribution systems.
• Electrical installations demanding high short circuit current ratings and IEC compliance.

Common Search Terms

NH fuse switch disconnector, MULTIBLOC Size 1, 250A fuse switch, 3-pole fuse switch, IEC fuse switch disconnector, electromechanic fuse monitoring, panel mounting fuse switch, bottom fitting fuse switch, industrial circuit protection.