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Approvals & Standards

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

Key features & benefits

The production programme of MULTIBLOC® series 3.ST8 comprises NH fuse switch disconnectors for 630A.
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 3 are designed for NH fuse-links in accordance with IEC/EN 60269-2, VDE 0636-2, size 3, 630A.
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


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Product Specifications

Item Number


Catalog number


Item Description (ERP)

MB3 630A 3P+N 1.002.661  


MULTIBLOC 3.ST8 size 3 / 160A, 4-pole N = solid link / pole 4, leading/lagging  

EAN/UPC code



50 ... 60   Hz

Rated voltage AC IEC

690   V

Rated current

630   A

Utilization Category

AC 23 B @ Ue = AC 400 V; Ie = 630 A  

Utilization Category

AC 22 B @ Ue = AC 500 V; Ie = 630 A  

Utilization Category

AC 21 B @ Ue = AC 690 V; Ie = 500 A  


3-,4-pole switching  

ROHS Compliant


Short Circuit Current Rating (SCCR)

80kA@Ue = AC 400 V; Ie = 630 A / 80kA@Ue = AC 500 V; Ie = 630 A / 50kA@Ue = AC 690 V; Ie = 500 A  

Fuse size


Design Details

with ready fitted speacial solid link as neutral conductor in pole 4 for leading and lagging switching  

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

18 kA / 1 s  

Conventional Free Air thermal Current With Fuse-Links Ith

630   A

Conventional Free Air thermal Current - Solid Links

780   A

Max Power dissipation of Fuse Links Pn

48   W

Max Power dissipation of Solid Links Pn

17.5   W

Power Dissipation by Ith without Fuse-Links

53   W

Power Dissipation by Ith without Solid Links

81   W

Rated short circuit making capacity with solid links Icm

18.6   kA

Installation Mounting

Bottom Fitting/panel  


Cable termination components : 8 M12 terminal screws  

Product Weight

7.71   kg

Product Width

331.5   mm

Product Length

153.9   mm

Product Height

299   mm

Sell Pack Quantity

1   EACH

Sell Pack Weight

7.71   kg

Sell Pack Width

320   mm

Sell Pack Length

350   mm

Sell Pack Height

170   mm