MERSEN FUSE MB1 250A 3P+N 1.002.378 1.002.378

NH fuse-switch disconnector MULTIBLOC® Size 1 250A 3-Pole+N switching Bottom Fitting/panel Connection Screw M10 designed for reliable and safe power distribution in industrial environments.

SKU: V1002128Alt SKU: 1.002.378MPN: V1002128

List Price £377.35 ex VAT

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£377.35

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

Engineered for reliable and safe power distribution, the NH fuse-switch disconnector MULTIBLOC® Size 1 offers robust 3-pole plus neutral switching for demanding industrial environments. Rated at 250A, this unit ensures optimum protection and isolation in low-voltage electrical installations.

Featuring bottom fitting and panel mounting with durable M10 screw connections, it provides quick, secure, and maintenance-friendly assembly. Choose this solution to enhance system integrity, operational safety, and service continuity in critical power applications.

Product Code: V1002128

Key Benefits

Reliable 3-pole plus neutral switching for enhanced safety and control
High ampere rating of 250A suitable for demanding industrial applications
Robust bottom fitting and panel mounting with secure M10 screw connections
Designed for easy installation and maintenance to reduce downtime
High short circuit current rating (80kA) ensures strong protection
Ready fitted special solid link neutral conductor for leading and lagging switching

Compatibility

This NH fuse-switch disconnector is compatible with IEC standard fuse links size 1 and designed for use in low-voltage electrical distribution systems up to 690 V AC. It is suitable for integration with industrial control panels and switchgear assemblies requiring 3-pole plus neutral switching.

Applications

Industrial power distribution and control panels
Low-voltage switchgear and motor control centres
Electrical isolation and protection in manufacturing plants
Renewable energy installations requiring safe disconnection
Maintenance and service continuity in critical power systems

Technical Specifications

Current	250 A
Phase	Three Phase
Item number	V1002128
Catalogue No	1.002.378
Description	NH fuse-switch disconnector MULTIBLOC® Size 1 250A 3-Pole+N switching Bottom Fitting/panel Connection Screw M10
EAN/UPC Code	9008567000816
Frequency (Hz)	50 ... 60 Hz
Rated voltage AC IEC	690 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
Switchability	4-pole switching
AC or DC	AC
Short Circuit Current Rating (SCCR)	80kA@Ue=AC 400 V;Ie=250 A / 80kA@Ue=AC 500 V;Ie=250 A / 80kA (1-,2-pole)@Ue=AC 690 V;Ie=200 A / 50kA (3-,4-pole)@Ue=AC 690 V;Ie=200 A
Fuse Size	1
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	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	13 W
Power Dissipation by Ith without Solid Links	33 W
Rated short circuit making capacity with solid links Icm	8.2 kA
Installation Mounting	Bottom Fitting/panel
Product Width	256 mm
Product Length	110.5 mm
Product Height	246 mm
Sell Pack Quantity	1 EA
Sell Pack Weight	3.55 kg
Sell Pack Width	250 mm
Sell Pack Length	260 mm
Sell Pack Height	125 mm
Product group	IEC Fuse Switch Disconnectors
Conventional Free Air thermal Current With Fuse-Links Ith	250 A
Product Weight	3.55 kg
Conventional Free Air thermal Current - Solid Links	400 A
HS Code	85365080
Country of Manufacture	Hungary
Poles	3-pole + N
Device Type	Fuse switch disconnector
Voltage	690 V

Frequently Asked Questions

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

The device is rated for up to 690 V AC according to IEC standards.

Can this product be used for DC applications?

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

What type of mounting does the product support?

It supports bottom fitting and panel mounting with M10 screw connections for secure installation.

What is the short circuit current rating (SCCR)?

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

Common Search Terms

NH fuse-switch disconnector, MULTIBLOC Size 1, 250A fuse switch, 3-pole plus neutral switch, IEC fuse switch disconnector, industrial fuse switch, panel mounting fuse switch, bottom fitting fuse switch, electrical isolation switch, low-voltage fuse switch

Current	250 A
Phase	Three Phase
Item number	V1002128
Catalogue No	1.002.378
Description	NH fuse-switch disconnector MULTIBLOC® Size 1 250A 3-Pole+N switching Bottom Fitting/panel Connection Screw M10
EAN/UPC Code	9008567000816
Frequency (Hz)	50 ... 60 Hz
Rated voltage AC IEC	690 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
Switchability	4-pole switching
AC or DC	AC
Short Circuit Current Rating (SCCR)	80kA@Ue=AC 400 V;Ie=250 A / 80kA@Ue=AC 500 V;Ie=250 A / 80kA (1-,2-pole)@Ue=AC 690 V;Ie=200 A / 50kA (3-,4-pole)@Ue=AC 690 V;Ie=200 A
Fuse Size	1
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	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	13 W
Power Dissipation by Ith without Solid Links	33 W
Rated short circuit making capacity with solid links Icm	8.2 kA
Installation Mounting	Bottom Fitting/panel
Product Width	256 mm
Product Length	110.5 mm
Product Height	246 mm
Sell Pack Quantity	1 EA
Sell Pack Weight	3.55 kg
Sell Pack Width	250 mm
Sell Pack Length	260 mm
Sell Pack Height	125 mm
Product group	IEC Fuse Switch Disconnectors
Conventional Free Air thermal Current With Fuse-Links Ith	250 A
Product Weight	3.55 kg
Conventional Free Air thermal Current - Solid Links	400 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

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

Delivery is calculated at checkout based on your destination.

Orders with mixed availability

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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.

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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.

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