Call Us Today
01706 242050
Trade Portal
MERSEN FUSE MB3 630A 4P 1.001.904 1.001.904

MERSEN FUSE MB3 630A 4P 1.001.904 1.001.904

Robust NH fuse-switch disconnector with 630A rating, 4-pole switching, bottom fitting and panel connection using M12 screw terminals for reliable industrial power distribution.

SKU: N1023075Alt SKU: 1.001.904MPN: N1023075
Price
List Price £1,233.72 ex VAT
Your Price (ex VAT)
£1,233.72
Manufacturer Lead Time Please contact us for a delivery time before you order
Get the best trade prices Trade exclusive

Create a trade account to unlock exclusive pricing, special offers and more.

Sign up for a trade account Quick & easy setup
SUBTOTAL (EX VAT) £1,233.72
Trade pricing is personalised to your account

Manufacturer Lead Time

£1,233.72

Why Choose the NH fuse-switch disconnector MULTIBLOC® Size 3 630A 3-Pole+N?

Engineered for robust industrial protection, the MULTIBLOC® Size 3 630A 3-Pole+N fuse-switch disconnector ensures reliable isolation and safe load switching in demanding low-voltage applications. Its bottom fitting and secure panel connection, utilising M12 screw terminals, enable straightforward, durable installation.

This device supports high-capacity operations up to 630A, offering long-term performance, minimal maintenance, and compliance with stringent safety standards. Ideal for professionals seeking efficiency and reliability in power distribution systems.

Product Code: N1023075

Key Benefits

  • High current rating of 630A suitable for demanding industrial applications.
  • Reliable 4-pole switching with neutral for comprehensive isolation.
  • Robust bottom fitting and panel connection with M12 screw terminals for secure installation.
  • Compliance with IEC standards ensuring safety and performance.
  • High short circuit current rating up to 80kA for enhanced protection.
  • Low maintenance design with durable construction for long service life.

Compatibility

This fuse-switch disconnector is compatible with NH fuse links size 3 and designed for use in low-voltage power distribution systems. It fits standard panel cut-outs and works efficiently with IEC Fuse Switch Disconnectors product group components.

Applications

  • Industrial power distribution and control panels.
  • Electrical isolation and protection in manufacturing plants.
  • Switching and protection in commercial electrical installations.
  • Maintenance and safety isolation in electrical networks.

Technical Specifications

Current 630 A
Phase Three Phase
Item number N1023075
Catalogue No 1.001.904
Description NH fuse-switch disconnector MULTIBLOC® Size 3 630A 3-Pole+N switching Bottom Fitting/panel Connection Screw M12
EAN/UPC Code 9008567002377
Frequency (Hz) 50 ... 60 Hz
Rated voltage AC IEC 690 V
Ampere Rating 630 A
Utilization Category AC 23 B @ Ue = AC 400 V; Ie = 630 A AC 22 B @ Ue = AC 500 V; Ie = 630 A AC 21 B @ Ue = AC 690 V; Ie = 500 A
Switchability 4-pole switching
RoHS Compliant Yes
AC or DC AC
Short Circuit Current Rating (SCCR) 80kA@Ue = AC 400 V; Ie = 630 A / 80kA@Ue = AC 500 V; Ie = 630 A / 50kA@Ue = AC 690 V; Ie = 500 A
Fuse Size 3
Number of Poles 4-Pole
Degree of Pollution 3
Rated Impulse Withstand Voltage 12 kV
Rated Insulation Voltage 1000 V
Rated SC Withstand 18 kA / 1 s
Max Power dissipation of Fuse Links Pn 48 W
Max Power dissipation of Solid Links Pn 17.5 W
Power Dissipation by Ith without Fuse-Links 53 W
Power Dissipation by Ith without Solid Links 81 W
Rated short circuit making capacity with solid links Icm 18.6 kA
Installation Mounting Bottom Fitting/panel
Product Width 331.5 mm
Product Length 153.9 mm
Product Height 299 mm
Sell Pack Quantity 1 EA
Sell Pack Weight 7.44 kg
Sell Pack Width 330 mm
Sell Pack Length 355 mm
Sell Pack Height 190 mm
Product group IEC Fuse Switch Disconnectors
Conventional Free Air thermal Current With Fuse-Links Ith 630 A
Product Weight 7.44 kg
Conventional Free Air thermal Current - Solid Links 780 A
HS Code 85365080
Country of Manufacture Hungary
Poles 4-pole
Device Type Fuse switch disconnector
Voltage 690 V

Frequently Asked Questions

What is the maximum current rating of this fuse-switch disconnector?

The maximum ampere rating is 630A, suitable for high-capacity industrial applications.

Can this device be used for DC applications?

No, this product is designed for AC applications only.

What type of fuse links does it support?

It supports NH fuse links size 3.

How is the device installed?

It is installed using bottom fitting with panel connection via M12 screw terminals.

Common Search Terms

NH fuse switch disconnector, MULTIBLOC Size 3, 630A fuse switch, 4-pole fuse switch, IEC fuse switch disconnector, industrial fuse switch, panel mount fuse switch, bottom fitting fuse switch, high current fuse switch, 3-pole plus neutral fuse switch

● Service Agreements

Credit Accounts

Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.

 Priority sourcing and supply support

 Flexible payment terms for qualifying organisations

 Support for engineering, maintenance, and operations

500 +

Stock lines ready to ship

1,000 +

Same day dispatches

3500 +

Customers supported

28 

Trusted Manfacturers

● frequently asked questions

Common questions about our products and support

 

At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.

What product ranges do you supply

We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products. 

Can you help specify the correct part?

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.

Do you have stock for urgent orders?

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.

What are your delivery times and costs?

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.

What about warranties, returns and faulty items?

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.

● latest blog

Discover  our latest insights and
expert advice

From a Simple Idea to Small Business of the Year: The LED Controls Story So Far…

From a Simple Idea to Small Business of the Year: The LED Controls Story So Far…

by | Aug 11, 2026 |

LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.

LED Controls: Danfoss Drives Authorised Partner

LED Controls: Danfoss Drives Authorised Partner

by | Jan 17, 2026 |

2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...

LED Controls: Your Complete Control Panel Solution

LED Controls: Your Complete Control Panel Solution

by | Jan 17, 2026 |

2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...