MERSEN FUSE MB1 250A 3P 1.001.294 1.001.294

Robust 3-pole fuse-switch disconnector with clamp strap connection for bus bar systems (40mm and 60mm), rated at 250A for AC and DC applications.

SKU: Q1023054Alt SKU: 1.001.294MPN: Q1023054

List Price £435.75 ex VAT

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£435.75

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Why Choose the NH Fuse-Switch Disconnector MULTIBLOC® Size 1 250A?

The NH fuse-switch disconnector MULTIBLOC® Size 1 250A offers robust 3-pole switching for bus bar systems (40mm), ensuring reliable circuit protection in industrial and commercial applications. Its design supports high operational safety and easy integration within modular power distribution assemblies.

Featuring dependable clamp strap connections, it guarantees secure and efficient installation, minimising downtime during maintenance. Engineered for durability and compliance with stringent standards, this unit is ideal for demanding environments requiring precise and stable power distribution.

Product Code: Q1023054

Key Benefits

Reliable 3-pole switching for enhanced circuit protection.
Compatible with bus bar systems of 40 mm and 60 mm for flexible installation.
Clamp strap connection ensures secure and easy mounting.
High short circuit current rating up to 80kA for safety under fault conditions.
Designed for both AC and DC applications, increasing versatility.
RoHS compliant, meeting environmental and safety standards.
Compact dimensions for efficient space utilisation in power distribution panels.

Compatibility

This fuse-switch disconnector is compatible with IEC standard fuse links size 1 and is designed to integrate seamlessly with modular bus bar systems of 40 mm and 60 mm widths. It supports a range of voltages up to 690 V AC and 440 V DC, making it suitable for various industrial and commercial electrical installations.

Applications

Industrial power distribution and control panels.
Commercial electrical installations requiring high safety standards.
Modular bus bar systems in factories and manufacturing plants.
Maintenance and service circuits where quick disconnection is essential.
Renewable energy systems requiring reliable fuse protection.

Technical Specifications

Current	250 A
Phase	Three Phase
Item number	Q1023054
Catalogue No	1.001.294
Description	NH fuse-switch disconnector MULTIBLOC® Size 1 250A 3-Pole switching Bus bar system 40mm Connection Clamp Strap clamp straps
EAN/UPC Code	9008567002155
Frequency (Hz)	50 ... 60 Hz
Rated voltage AC IEC	690 V
Rated voltage DC IEC	440 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 DC 21 B @ Ue = DC 440 V; Ie = 250 A
Switchability	3-pole switching
RoHS Compliant	Yes
AC or DC	AC/DC
Short Circuit Current Rating (SCCR)	80kA@Ue = AC 400 V; Ie = 250 A / 80kA@Ue = AC 500 V; Ie = 250 A / 50kA (3-,4-pole)@Ue = AC 690 V; Ie = 200 A
Fuse Size	1
Design Details	Clamp Strap
Number of Poles	3-Pole
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	20 W
Rated short circuit making capacity with solid links Icm	8.2 kA
Installation Mounting	Bus bar system 40 mm and 60 mm
Product Width	185 mm
Product Length	110.5 mm
Product Height	246 mm
Sell Pack Quantity	1 EA
Sell Pack Weight	3.06 kg
Sell Pack Width	187 mm
Sell Pack Length	248 mm
Sell Pack Height	165 mm
Product group	IEC Fuse Switch Disconnectors
Conventional Free Air thermal Current With Fuse-Links Ith	250 A
Product Weight	3.06 kg
Conventional Free Air thermal Current - Solid Links	400 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 rated current of this fuse-switch disconnector?

The rated current is 250 A, suitable for medium power distribution applications.

Can this product be used in DC circuits?

Yes, it is rated for use in DC circuits up to 440 V IEC.

What type of mounting does this product support?

It supports mounting on bus bar systems with 40 mm and 60 mm widths.

Is the product RoHS compliant?

Yes, this fuse-switch disconnector complies with RoHS regulations.

What is the short circuit current rating (SCCR)?

The SCCR is up to 80kA at AC 400 V and AC 500 V, and 50kA at AC 690 V.

Common Search Terms

NH fuse-switch disconnector, MULTIBLOC fuse switch, 250A fuse switch, 3-pole fuse switch, bus bar fuse switch 40mm, clamp strap fuse switch, IEC fuse switch disconnector, industrial fuse switch, high SCCR fuse switch, AC/DC fuse switch

Current	250 A
Phase	Three Phase
Item number	Q1023054
Catalogue No	1.001.294
Description	NH fuse-switch disconnector MULTIBLOC® Size 1 250A 3-Pole switching Bus bar system 40mm Connection Clamp Strap clamp straps
EAN/UPC Code	9008567002155
Frequency (Hz)	50 ... 60 Hz
Rated voltage AC IEC	690 V
Rated voltage DC IEC	440 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 DC 21 B @ Ue = DC 440 V; Ie = 250 A
Switchability	3-pole switching
RoHS Compliant	Yes
AC or DC	AC/DC
Short Circuit Current Rating (SCCR)	80kA@Ue = AC 400 V; Ie = 250 A / 80kA@Ue = AC 500 V; Ie = 250 A / 50kA (3-,4-pole)@Ue = AC 690 V; Ie = 200 A
Fuse Size	1
Design Details	Clamp Strap
Number of Poles	3-Pole
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	20 W
Rated short circuit making capacity with solid links Icm	8.2 kA
Installation Mounting	Bus bar system 40 mm and 60 mm
Product Width	185 mm
Product Length	110.5 mm
Product Height	246 mm
Sell Pack Quantity	1 EA
Sell Pack Weight	3.06 kg
Sell Pack Width	187 mm
Sell Pack Length	248 mm
Sell Pack Height	165 mm
Product group	IEC Fuse Switch Disconnectors
Conventional Free Air thermal Current With Fuse-Links Ith	250 A
Product Weight	3.06 kg
Conventional Free Air thermal Current - Solid Links	400 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.

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£8 ex VAT · free over £200

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

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

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

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Faulty or damaged items

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

Made-to-order items

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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.

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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.

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