MERSEN FUSE MB4a 1600A 1P 1.000.084 1.000.084

Reliable NH fuse-switch disconnector with 1-pole switching, bottom fitting, and screw M12 panel connection, rated at 1600A for heavy-duty industrial applications.

SKU: X1023083Alt SKU: 1.000.084MPN: X1023083

List Price £734.38 ex VAT

Your Price (ex VAT)

£734.38

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) £734.38

Trade pricing is personalised to your account

Manufacturer Lead Time

£734.38

Why Choose the NH Fuse-Switch Disconnector MULTIBLOC® Size 4a 1600A?

The NH fuse-switch disconnector MULTIBLOC® Size 4a 1600A provides reliable and efficient circuit protection for heavy-duty electrical applications. Designed for 1-pole switching with bottom fitting, it ensures safe and straightforward integration into panel systems, even in demanding industrial environments.

This unit features a robust screw M12 panel connection for secure installation and stable performance under high current loads. Engineered for durability and compliance with stringent safety standards, it is ideal for professionals seeking dependable protection and easy maintenance in high-capacity power distribution.

Product Code: X1023083

Key Benefits

Reliable protection for high current electrical circuits up to 1600A
Robust screw M12 panel connection ensures secure and stable installation
Compact design with bottom fitting for easy integration into panel systems
High short circuit current rating of up to 31.5kA for enhanced safety
Designed for 1-pole switching with clear operational status
Durable construction suitable for demanding industrial environments

Compatibility

This NH fuse-switch disconnector is compatible with IEC fuse switch disconnectors and designed to fit panel systems requiring bottom fitting with screw M12 connections. It supports a range of fuse sizes and is suitable for use with AC systems operating between 50 and 60 Hz up to 690 V.

Applications

Heavy-duty industrial power distribution
Electrical panel protection in manufacturing plants
Switchgear assemblies requiring high current fuse protection
Power supply systems in commercial and utility installations
Maintenance and upgrade of existing electrical distribution networks

Technical Specifications

Current	1600 A
Phase	Single Phase
Item number	X1023083
Catalogue No	1.000.084
Description	NH fuse-switch disconnector MULTIBLOC® Size 4a 1600A 1-pole switching Bottom Fitting/panel Connection Screw M12
EAN/UPC Code	4027597023331
Frequency (Hz)	50 ... 60 Hz
Rated voltage AC IEC	690 V
Ampere Rating	1600 A
Utilization Category	AC 22 B @ Ue = AC 400 V; Ie = 1250 A AC 21 B @ Ue = AC 690 V; Ie = 1600 A DC 21 B @ Ue = DC 220 V; Ie = 1600 A DC 21 B @ Ue = DC 440 V; Ie = 1250 A
Switchability	1-pole switching
AC or DC	AC
Short Circuit Current Rating (SCCR)	31,5kA@Ue = AC 400 V; Ie = 1600 A / 31,5kA@Ue = AC 500 V; Ie = 1600 A / 31,5kA@Ue = AC 690 V; Ie = 1600 A
Fuse Size	4a
Number of Poles	1-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	140 W
Max Power dissipation of Solid Links Pn	42 W
Power Dissipation by Ith without Fuse-Links	80 W
Power Dissipation by Ith without Solid Links	80 W
Rated short circuit making capacity with solid links Icm	100 kA
Installation Mounting	Bottom Fitting/panel
Product Width	126 mm
Product Length	233 mm
Product Height	330 mm
Sell Pack Quantity	1 EA
Sell Pack Weight	5 kg
Sell Pack Width	120 mm
Sell Pack Length	355 mm
Sell Pack Height	270 mm
Product group	IEC Fuse Switch Disconnectors
Conventional Free Air thermal Current With Fuse-Links Ith	1600 A
Product Weight	5 kg
Conventional Free Air thermal Current - Solid Links	1800 A
HS Code	85365080
Country of Manufacture	Hungary
Poles	1-pole
Device Type	Fuse switch disconnector
Voltage	690 V

Frequently Asked Questions

What is the rated current of this fuse-switch disconnector?

The rated current is 1600 A, suitable for heavy-duty electrical applications.

Can this product be used in DC applications?

This specific model is designed for AC use only, as indicated by its AC rating and specifications.

What type of mounting does the product support?

It supports bottom fitting for panel mounting, ensuring secure installation.

What is the short circuit current rating (SCCR)?

The SCCR is 31.5 kA at various voltages including AC 400 V, 500 V, and 690 V.

What size fuse does this disconnector accommodate?

It accommodates NH fuse size 4a.

Common Search Terms

NH fuse switch disconnector, MULTIBLOC 1600A, 1-pole fuse switch, bottom fitting panel switch, screw M12 connection, IEC fuse switch disconnector, high current fuse holder, industrial circuit protection, 690V fuse switch, 31.5kA SCCR fuse switch

Current	1600 A
Phase	Single Phase
Item number	X1023083
Catalogue No	1.000.084
Description	NH fuse-switch disconnector MULTIBLOC® Size 4a 1600A 1-pole switching Bottom Fitting/panel Connection Screw M12
EAN/UPC Code	4027597023331
Frequency (Hz)	50 ... 60 Hz
Rated voltage AC IEC	690 V
Ampere Rating	1600 A
Utilization Category	AC 22 B @ Ue = AC 400 V; Ie = 1250 A AC 21 B @ Ue = AC 690 V; Ie = 1600 A DC 21 B @ Ue = DC 220 V; Ie = 1600 A DC 21 B @ Ue = DC 440 V; Ie = 1250 A
Switchability	1-pole switching
AC or DC	AC
Short Circuit Current Rating (SCCR)	31,5kA@Ue = AC 400 V; Ie = 1600 A / 31,5kA@Ue = AC 500 V; Ie = 1600 A / 31,5kA@Ue = AC 690 V; Ie = 1600 A
Fuse Size	4a
Number of Poles	1-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	140 W
Max Power dissipation of Solid Links Pn	42 W
Power Dissipation by Ith without Fuse-Links	80 W
Power Dissipation by Ith without Solid Links	80 W
Rated short circuit making capacity with solid links Icm	100 kA
Installation Mounting	Bottom Fitting/panel
Product Width	126 mm
Product Length	233 mm
Product Height	330 mm
Sell Pack Quantity	1 EA
Sell Pack Weight	5 kg
Sell Pack Width	120 mm
Sell Pack Length	355 mm
Sell Pack Height	270 mm
Product group	IEC Fuse Switch Disconnectors
Conventional Free Air thermal Current With Fuse-Links Ith	1600 A
Product Weight	5 kg
Conventional Free Air thermal Current - Solid Links	1800 A
HS Code	85365080
Country of Manufacture	Hungary
Poles	1-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