Skip to main content

All locations

Please select your country & language

China | 中国
Germany | Deutschland

Your country is not in the list?

Go to our international website:

Mersen EP International Website
Country / Language:  France / English
Contact us

Approvals & Standards

  • IEC/EN 60 947-3
  • For NH-fuse links size 2 in accordance with IEC/EN 60 269-2, VDE 0636-2

Key features & benefits

The production programme of MULTIBLOC® series 2.ST8 comprises NH fuse switch disconnectors for 400A.
They are designed for bottom fitting/panel installation and are available in triple pole and quadruple pole units.
For installation of MULTIBLOC® NH fuse switch disconnectors in distribution units with central cover, respective covers are used to obtain a uniform profile in height and length.
MULTIBLOC® size 2 are designed for NH fuse-links in accordance with IEC/EN 60269-2, VDE 0636-2, size 2, 400A.
MULTIBLOC® offers the user the possibility of fast and easy installation as well as a high degree of security during installation and maintenance.

More specifications


  • Panel boards for industrial use
  • Feeder pillars for industrial use
  • Meter distribution units
  • Measuring transformer cabinets
  • Transmitting stations for telecommunications

Product Specifications

Item Number


Catalog number


Item Description (ERP)

MB2 400A 3P 1.000.832  


MULTIBLOC 2.ST8 size 2 / 400A, 3-pole electromechanical fuse monit. installed  

EAN/UPC code



50 ... 60   Hz

Rated voltage AC IEC

690   V

Rated current

400   A

Utilization Category

AC 23 B @ Ue = AC 400 V; Ie = 400 A  

Utilization Category

AC 22 B @ Ue = AC 500 V; Ie = 400 A  

Utilization Category

AC 21 B @ Ue = AC 690 V; Ie = 315 A  

Utilization Category

DC 21 B @ Ue = DC 440 V; Ie = 400 A  


3-,4-pole switching  

ROHS Compliant


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


Design Details

with electromechanic fuse monitoring MZS installed (galvanic isolation)  

Number of Poles


Degree of pollution


Rated Duty

uninterrupted duty  

Rated Impulse Withstand Voltage Uimp

12   kV

Rated Insulation Voltage

1000   V

Rated SC Withstand

13 kA / 1 s  

Conventional Free Air thermal Current With Fuse-Links Ith

400   A

Conventional Free Air thermal Current - Solid Links

630   A

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  


Cable termination components : 6 M10 terminal screws  

Product Weight

4.25   kg

Product Width

204.5   mm

Product Length

207   mm

Product Height

259   mm

Sell Pack Quantity

1   EACH

Sell Pack Weight

4.25   kg

Sell Pack Width

215   mm

Sell Pack Length

280   mm

Sell Pack Height

230   mm