MERSEN FUSE MB2 400A 3P+N 1.002.379 1.002.379

Engineered for secure and reliable operation, the NH Fuse-Switch Disconnector MULTIBLOC® Size 2 400A 3-Pole+N delivers robust performance in demanding industrial and commercial installations. Designed for bottom fitting with panel connection, it ensures safe and efficient fuse switching and isolation up to 400A.

SKU: Y1002131Alt SKU: 1.002.379MPN: Y1002131

List Price £1,228.85 ex VAT

Your Price (ex VAT) Save 40%

£737.31 40% OFF

You save £491.54 per unit

Manufacturer Lead Time Please contact us for a delivery time before you order

Get the best trade prices Trade exclusive

Create an online account to unlock exclusive pricing, special offers and more.

Create an online account Quick & easy setup

Quantity:

SUBTOTAL (EX VAT) £737.31

Trade pricing is personalised to your account

Manufacturer Lead Time

£737.31

Why Choose the NH Fuse-Switch Disconnector MULTIBLOC® Size 2 400A 3-Pole+N?

Featuring a rugged construction with M10 screw terminals, this unit facilitates straightforward installation and dependable electrical connections. Ideal for professionals seeking durability and compliance, it offers optimal safety and operational flexibility in low-voltage power distribution systems.

Product Code: Y1002131

Key Benefits

High current rating of 400A suitable for demanding industrial applications
Robust and durable construction ensures long-lasting performance
Bottom fitting with panel connection for easy installation
M10 screw terminals provide secure and reliable electrical connections
4-pole switching with neutral conductor for enhanced safety and operational flexibility
Complies with RoHS standards for environmental safety
High short circuit current rating up to 80kA for superior protection

Compatibility

This NH Fuse-Switch Disconnector is compatible with IEC fuse links Size 2 and is designed for use in low-voltage power distribution systems up to 690 V AC. It is suitable for integration with standard industrial panels and switchgear requiring 3-pole plus neutral switching and isolation.

Applications

Industrial power distribution and control panels
Commercial electrical installations requiring reliable fuse switching
Low-voltage switchgear assemblies
Protection and isolation of electrical circuits in manufacturing plants
Maintenance and safety isolation in electrical distribution systems

Technical Specifications

Tick the specs you need, then view products that match.

Mounting Type	Base / panel
Current	400 A
Phase	Three Phase
Poles	3-pole + N
Device Type	Fuse switch disconnector
Voltage	690 V
Item number	Y1002131
Catalogue No	1.002.379
Description	NH fuse-switch disconnector MULTIBLOC® Size 2 400A 3-Pole+N switching Bottom Fitting/panel Connection Screw M10
EAN/UPC Code	9008567000823
Frequency (Hz)	50 ... 60 Hz
Rated voltage AC IEC	690 V
Ampere Rating	400 A
Utilization Category	AC 23 B @ Ue = AC 400 V; Ie = 400 A AC 22 B @ Ue = AC 500 V; Ie = 400 A AC 21 B @ Ue = AC 690 V; Ie = 315 A
Switchability	4-pole switching
RoHS Compliant	Yes
AC or DC	AC
Short Circuit Current Rating (SCCR)	80kA@Ue = AC 400 V; Ie = 400 A / 80kA@Ue = AC 500 V; Ie = 400 A / 80kA (3-pole)@Ue = AC 690 V; Ie = 315 A / 50kA (4-pole)@Ue = AC 690 V; Ie = 315 A
Fuse Size	2
Design Details	with ready fitted speacial solid link as neutral conductor in pole 4 for leading and lagging switching
Number of Poles	3-Pole+N
Degree of Pollution	3
Rated Impulse Withstand Voltage	12 kV
Rated Insulation Voltage	1000 V
Rated SC Withstand	13 kA / 1 s
Max Power dissipation of Fuse Links Pn	34 W
Max Power dissipation of Solid Links Pn	9 W
Power Dissipation by Ith without Fuse-Links	27 W
Power Dissipation by Ith without Solid Links	67 W
Rated short circuit making capacity with solid links Icm	10.6 kA
Installation Mounting	Bottom Fitting/panel
Product Width	274 mm
Product Length	138.5 mm
Product Height	259 mm
Sell Pack Quantity	1 EA
Sell Pack Weight	5.26 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	400 A
Product Weight	5.26 kg
Conventional Free Air thermal Current - Solid Links	630 A
HS Code	85365080
Country of Manufacture	Hungary

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 device 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 with panel connection for installation.

Is this product RoHS compliant?

Yes, it complies with RoHS standards.

What is the short circuit current rating (SCCR) of this device?

The SCCR is 80kA at AC 400 V and AC 500 V for 3-pole, and 50kA at AC 690 V for 4-pole configurations.

Common Search Terms

NH fuse switch disconnector, MULTIBLOC size 2 fuse switch, 400A fuse switch, 3-pole plus neutral disconnector, bottom fitting fuse switch, M10 screw terminal fuse switch, IEC fuse switch disconnectors, industrial fuse switch, panel mount fuse switch

Mounting Type	Base / panel
Current	400 A
Phase	Three Phase
Item number	Y1002131
Catalogue No	1.002.379
Description	NH fuse-switch disconnector MULTIBLOC® Size 2 400A 3-Pole+N switching Bottom Fitting/panel Connection Screw M10
EAN/UPC Code	9008567000823
Frequency (Hz)	50 ... 60 Hz
Rated voltage AC IEC	690 V
Ampere Rating	400 A
Utilization Category	AC 23 B @ Ue = AC 400 V; Ie = 400 A AC 22 B @ Ue = AC 500 V; Ie = 400 A AC 21 B @ Ue = AC 690 V; Ie = 315 A
Switchability	4-pole switching
RoHS Compliant	Yes
AC or DC	AC
Short Circuit Current Rating (SCCR)	80kA@Ue = AC 400 V; Ie = 400 A / 80kA@Ue = AC 500 V; Ie = 400 A / 80kA (3-pole)@Ue = AC 690 V; Ie = 315 A / 50kA (4-pole)@Ue = AC 690 V; Ie = 315 A
Fuse Size	2
Design Details	with ready fitted speacial solid link as neutral conductor in pole 4 for leading and lagging switching
Number of Poles	3-Pole+N
Degree of Pollution	3
Rated Impulse Withstand Voltage	12 kV
Rated Insulation Voltage	1000 V
Rated SC Withstand	13 kA / 1 s
Max Power dissipation of Fuse Links Pn	34 W
Max Power dissipation of Solid Links Pn	9 W
Power Dissipation by Ith without Fuse-Links	27 W
Power Dissipation by Ith without Solid Links	67 W
Rated short circuit making capacity with solid links Icm	10.6 kA
Installation Mounting	Bottom Fitting/panel
Product Width	274 mm
Product Length	138.5 mm
Product Height	259 mm
Sell Pack Quantity	1 EA
Sell Pack Weight	5.26 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	400 A
Product Weight	5.26 kg
Conventional Free Air thermal Current - Solid Links	630 A
HS Code	85365080
Country of Manufacture	Hungary
Poles	3-pole + N
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.