MERSEN FUSE MB3 630A 3P 1.001.150 1.001.150

The NH fuse-switch disconnector MULTIBLOC® Size 3 is engineered for demanding industrial applications, providing reliable protection and safe switching for circuits rated up to 630A. Features bottom fitting/panel mounting and M12 screw terminals with electromechanic fuse monitoring.

SKU: K1023072Alt SKU: 1.001.150MPN: K1023072

List Price £1,023.24 ex VAT

Your Price (ex VAT)

£1,023.24

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.

Quantity:

SUBTOTAL (EX VAT) £1,023.24

Trade pricing is personalised to your account

Manufacturer Lead Time

£1,023.24

Why Choose the NH Fuse-Switch Disconnector MULTIBLOC® Size 3 630A 3-Pole?

The NH fuse-switch disconnector MULTIBLOC® Size 3 is engineered for demanding industrial applications, providing reliable protection and safe switching for circuits rated up to 630A. Its robust three-pole configuration ensures consistent performance in low-voltage distribution systems.

Featuring a durable bottom fitting/panel connection and secure M12 screw terminals, this unit offers straightforward installation and long-term operational dependability. Compliant with IEC standards, it is ideal for panel builders and OEMs seeking enhanced safety and efficiency in power distribution.

Product Code: K1023072

Key Benefits

Reliable protection with IEC compliance for industrial applications
Robust 3-pole switching design suitable for 630A circuits
Durable bottom fitting/panel mounting for secure installation
Secure M12 screw terminals for easy and safe connections
Electromechanic fuse monitoring with galvanic isolation enhances safety
High short circuit current rating ensures operational safety under fault conditions

Compatibility

This NH fuse-switch disconnector is compatible with Size 3 NH fuses and is designed to integrate seamlessly into low-voltage distribution systems operating up to 690 V AC. It fits panel mounting configurations requiring bottom fitting connections and supports electromechanic fuse monitoring accessories.

Applications

Industrial power distribution panels
Motor control centres and switchboards
OEM equipment requiring reliable fuse-switch disconnectors
Low-voltage electrical installations up to 630A
Protection and isolation in manufacturing plants and factories

Technical Specifications

Current	630 A
Phase	Three Phase
Item number	K1023072
Catalogue No	1.001.150
Description	NH fuse-switch disconnector MULTIBLOC® Size 3 630A 3-Pole switching Bottom Fitting/panel Connection Screw M12 elecmec mon.
EAN/UPC Code	9008567002360
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	3-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
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	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	256 mm
Product Length	224 mm
Product Height	299 mm
Sell Pack Quantity	1 EA
Sell Pack Weight	5.74 kg
Sell Pack Width	265 mm
Sell Pack Length	325 mm
Sell Pack Height	155 mm
Product group	IEC Fuse Switch Disconnectors
Conventional Free Air thermal Current With Fuse-Links Ith	630 A
Product Weight	5.74 kg
Conventional Free Air thermal Current - Solid Links	780 A
HS Code	85365080
Country of Manufacture	Hungary
Poles	3-pole
Device Type	Fuse switch disconnector
Voltage	690 V

Frequently Asked Questions

What is the maximum rated voltage for this fuse-switch disconnector?

The maximum rated voltage AC IEC for this product is 690 V.

Can this unit be used for DC applications?

No, this fuse-switch disconnector is designed for AC applications only.

What type of mounting does this product support?

It supports bottom fitting/panel mounting for secure installation.

Does this product include fuse monitoring?

Yes, it includes electromechanic fuse monitoring MZS installed with galvanic isolation.

What is the short circuit current rating (SCCR)?

The SCCR is 80kA at AC 400 V and 500 V for 630 A, and 50kA at AC 690 V for 500 A.

Common Search Terms

NH fuse switch disconnector, MULTIBLOC Size 3, 630A fuse switch, 3-pole fuse switch, bottom fitting fuse switch, M12 terminal fuse switch, IEC fuse switch disconnector, industrial fuse switch, electromechanic fuse monitoring, low voltage fuse switch

Current	630 A
Phase	Three Phase
Item number	K1023072
Catalogue No	1.001.150
Description	NH fuse-switch disconnector MULTIBLOC® Size 3 630A 3-Pole switching Bottom Fitting/panel Connection Screw M12 elecmec mon.
EAN/UPC Code	9008567002360
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	3-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
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	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	256 mm
Product Length	224 mm
Product Height	299 mm
Sell Pack Quantity	1 EA
Sell Pack Weight	5.74 kg
Sell Pack Width	265 mm
Sell Pack Length	325 mm
Sell Pack Height	155 mm
Product group	IEC Fuse Switch Disconnectors
Conventional Free Air thermal Current With Fuse-Links Ith	630 A
Product Weight	5.74 kg
Conventional Free Air thermal Current - Solid Links	780 A
HS Code	85365080
Country of Manufacture	Hungary
Poles	3-pole
Device Type	Fuse switch disconnector
Voltage	690 V

UK delivery

Delivery options

Free UK delivery on orders over £200 ex VAT. Order in-stock items before 2pm Monday to Friday for next-day delivery.

This product Lead time on request

Please contact us for a delivery time before you order

Standard delivery

£8 ex VAT · free over £200

UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.

Heavier items may be charged at a weight-based or pallet rate, shown at checkout.

Collect from our showroom

Mon–Fri, 8am–5pm

Order and pay online, then collect from our showroom.

Please allow 15–30 minutes after ordering for us to prepare your order.

Northern Ireland, ROI & export

Priced at checkout

We deliver to Northern Ireland, the Republic of Ireland and overseas.

Delivery is calculated at checkout based on your destination.

Orders with mixed availability

Shipped complete

If part of your order is on a lead time, we hold it and send everything together.

Need the in-stock items sooner? Ask us and we can split the delivery.

Business customer returns

Returns & order support

Need to return an item? Find the guidance for your order below, then contact our team before sending anything back.

Stocked items

Request within 30 days

Changed your mind or ordered the wrong item? Request a return within 30 days of receipt. There is no restocking charge.

Items must be unused, in resalable condition and in their original packaging, and returns need our approval first. Return carriage is at your cost, and the original delivery charge is not refunded.

Faulty or damaged items

Tell us as soon as possible

Faulty, damaged on delivery or the wrong product supplied? Contact our team as soon as possible with the details.

We will review the issue and arrange an appropriate resolution under our terms and conditions and your statutory rights.

Made-to-order items

Manufacturer approval needed

Manufactured, configured and special-order products can only be returned with the manufacturer’s approval. Any handling charge is agreed with you when you request the return.

This does not affect claims for faulty goods or items that do not meet the agreed specification.

LED Controls showroom with electrical products on display

Let’s get your return sorted.

Send your order number, product details and reason for return. For faults or delivery damage, include photographs if available. We will confirm the next steps.

Email returns team 01706 242050

The 30-day return request period applies to change-of-mind returns for stocked items. It does not limit your statutory rights for faulty or non-conforming goods.

● 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?

What are your delivery times and costs?

What about warranties, returns and faulty items?

● 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…

by admin | Aug 11, 2026 | News

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

by admin | Jan 17, 2026 | Product Spotlight

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