MERSEN FUSE MB1 250A 1P 1.000.397 1.000.397

Reliable and safe circuit protection fuse-switch disconnector with bottom fitting and M10 screw terminal panel connection, rated for 250A and 2-pole switching.

SKU: R229877Alt SKU: 1.000.397MPN: R229877

List Price £223.23 ex VAT

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Why Choose the NH Fuse-Switch Disconnector MULTIBLOC® Size 1 250A 2-Pole?

Engineered for reliable and safe circuit protection, the NH Fuse-Switch Disconnector MULTIBLOC® Size 1 250A 2-Pole is ideal for demanding industrial environments. With a robust bottom fitting and secure panel connection via M10 screw terminals, it ensures efficient installation and maintenance.

This unit delivers precise switching and disconnection up to 250A, supporting two-pole configurations for enhanced operational flexibility. Designed to meet stringent safety standards, it provides long-term durability and superior operational dependability for your electrical infrastructure.

Product Code: R229877

Key Benefits

Reliable circuit protection up to 250A for industrial applications
Robust bottom fitting with secure M10 screw terminal panel connection
Supports 2-pole switching for enhanced operational flexibility
High short circuit current rating ensuring safety under fault conditions
Designed for long-term durability and compliance with safety standards

Compatibility

This fuse-switch disconnector is compatible with NH size 1 fuse links and designed for integration into IEC Fuse Switch Disconnector panels. It supports AC systems up to 690 V and is suitable for use with both fuse and solid links as specified.

Applications

Industrial electrical distribution systems
Motor protection and control circuits
Power distribution panels requiring reliable switching and disconnection
Maintenance and safety isolation in electrical installations

Technical Specifications

Current	250 A
Phase	Single Phase
Item number	R229877
Catalogue No	1.000.397
Description	NH fuse-switch disconnector MULTIBLOC® Size 1 250A 2-Pole switching Bottom Fitting/panel Connection Screw M10
EAN/UPC Code	4027597026783
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 DC 22 B @ Ue = DC 220 V; Ie = 250 A
Switchability	2-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
Number of Poles	2-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	9 W
Power Dissipation by Ith without Solid Links	23 W
Rated short circuit making capacity with solid links Icm	8.2 kA
Installation Mounting	Bottom Fitting/panel
Product Width	142 mm
Product Length	110.5 mm
Product Height	246 mm
Sell Pack Quantity	1 EA
Sell Pack Weight	2.06 kg
Sell Pack Width	195 mm
Sell Pack Length	265 mm
Sell Pack Height	115 mm
Product group	IEC Fuse Switch Disconnectors
Conventional Free Air thermal Current With Fuse-Links Ith	250 A
Product Weight	2.06 kg
Conventional Free Air thermal Current - Solid Links	400 A
HS Code	85365080
Country of Manufacture	Hungary
Poles	2-pole
Device Type	Fuse switch disconnector
Voltage	690 V

Frequently Asked Questions

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

The maximum rated current is 250 A as specified in the technical specifications.

Can this product be used in DC applications?

This particular model is designed for AC applications only.

What type of mounting does this device use?

It uses a bottom fitting for panel mounting with M10 screw terminals.

What is the short circuit current rating?

The short circuit current rating is up to 80kA depending on voltage and pole configuration.

Common Search Terms

NH fuse-switch disconnector, MULTIBLOC size 1, 250A fuse switch, 2-pole disconnector, IEC fuse switch, industrial fuse switch, panel mounted fuse switch, M10 screw terminal fuse switch

Current	250 A
Phase	Single Phase
Item number	R229877
Catalogue No	1.000.397
Description	NH fuse-switch disconnector MULTIBLOC® Size 1 250A 2-Pole switching Bottom Fitting/panel Connection Screw M10
EAN/UPC Code	4027597026783
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 DC 22 B @ Ue = DC 220 V; Ie = 250 A
Switchability	2-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
Number of Poles	2-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	9 W
Power Dissipation by Ith without Solid Links	23 W
Rated short circuit making capacity with solid links Icm	8.2 kA
Installation Mounting	Bottom Fitting/panel
Product Width	142 mm
Product Length	110.5 mm
Product Height	246 mm
Sell Pack Quantity	1 EA
Sell Pack Weight	2.06 kg
Sell Pack Width	195 mm
Sell Pack Length	265 mm
Sell Pack Height	115 mm
Product group	IEC Fuse Switch Disconnectors
Conventional Free Air thermal Current With Fuse-Links Ith	250 A
Product Weight	2.06 kg
Conventional Free Air thermal Current - Solid Links	400 A
HS Code	85365080
Country of Manufacture	Hungary
Poles	2-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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