MERSEN FUSE MB1 250A 3PTRI40/60 1.000.323 1.000.323

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

Engineered for reliable protection and efficient operation within 40mm bus bar systems, this NH fuse-switch disconnector delivers proven performance at up to 250A across three poles. The robust screw M10 terminals ensure secure, low-resistance connections and facilitate straightforward installation in industrial switchgear assemblies.

Certified for demanding environments, the MULTIBLOC® design supports safe electrical isolation and simplifies maintenance procedures. Depend on this solution for high integrity circuit protection and long-term operational safety in your power distribution applications.

Technical Specifications

• Item number: T229879
• Catalogue No: 1.000.323
• Description: NH fuse-switch disconnector MULTIBLOC® Size 1 250A 3-Pole switching Bus bar system 40mm Connection Screw M10
• EAN/UPC Code: 4027597026707
• Frequency (Hz): 50 ... 60 Hz
• Rated voltage AC IEC: 690 V
• Rated voltage DC IEC: 440 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/DC
• Short Circuit Current Rating (SCCR): 80kA@Ue = AC 400 V; Ie = 250 A / 80kA@Ue = AC 500 V; Ie = 250 A / 50kA (3-,4-pole)@Ue = AC 690 V; Ie = 200 A
• Fuse Size: 1
• 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: 20 W
• Rated short circuit making capacity with solid links Icm: 8.2 kA
• Installation Mounting: Bus bar system 40 mm and 60 mm
• Product Width: 185 mm
• Product Length: 110.5 mm
• Product Height: 246 mm
• Sell Pack Quantity: 1 EA
• Sell Pack Weight: 3.09 kg
• Sell Pack Width: 187 mm
• Sell Pack Length: 248 mm
• Sell Pack Height: 165 mm
• Product group: IEC Fuse Switch Disconnectors
• Conventional Free Air thermal Current With Fuse-Links Ith: 250 A
• Product Weight: 3.09 kg
• Conventional Free Air thermal Current - Solid Links: 400 A

Product Code: T229879

Key Benefits

• Reliable circuit protection up to 250A with 3-pole switching capability.
• Robust screw M10 terminals for secure and low-resistance connections.
• Compatible with 40 mm and 60 mm bus bar systems for flexible installation.
• High short circuit current rating up to 80kA ensuring safety under fault conditions.
• Designed for easy maintenance and safe electrical isolation.
• RoHS compliant, supporting environmental safety standards.

Compatibility

This NH fuse-switch disconnector is compatible with IEC fuse switch disconnectors and designed for integration within industrial switchgear assemblies using 40 mm and 60 mm bus bar systems. It supports both AC and DC applications up to 690 V AC and 440 V DC respectively, making it suitable for a wide range of power distribution systems.

Applications

• Industrial power distribution and control panels.
• Electrical isolation and protection in manufacturing plants.
• Switchgear assemblies requiring high integrity circuit protection.
• Maintenance and safety shutdown operations in electrical installations.
• Renewable energy systems and infrastructure requiring robust fuse protection.

Common Search Terms

NH fuse-switch disconnector, MULTIBLOC® Size 1, 250A fuse switch, 3-pole disconnector, industrial fuse switch, bus bar system 40mm, screw M10 terminal fuse switch, IEC fuse switch disconnectors, high current fuse switch, electrical isolation switch.