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Approvals & Standards

  • IEC/EN 60 947-3
For NH-fuse links size 00, size 1, size 2 and size 3
in accordance with IEC/EN 60 269, VDE 0636

Key features & benefits

The production programme of MULTIBLOC® 800VAC comprises NH fuse switch disconnectors for 800VAC voltage application. This range includes Size 00 (00.ST9), Size 1 (1.ST8), Size 2 (2.ST8) & Size 3 (3.ST8) Multibloc and answers the specific needs of Photovoltaic application for using String inverters rated at 800Vac.
They are designed for bottom fitting/panel installation and are available in triple 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 00,1, 2 & 3 are designed for NH fuse-links in accordance with IEC/EN 60269, VDE 0636, size 00, size 1, size 2 and size 3, 80A, 160A, 250A and 315A.
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


  • Power distibution and Motor protection
  • Photovoltaic application: Protection on lines of String inverters rated at 800VAC

Product Specifications

Item Number


Catalog number



NH fuse-switch disconnector MULTIBLOC® Size 2 250A 3-Pole switching Bottom Fitting/panel Connection Clamp Strap / Screw clamp straps M10  

EAN/UPC code



50 ... 60   Hz

Rated voltage AC IEC

800   V

Rated current

250   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


AC or DC


Short Circuit Current Rating (SCCR)

Ue=AC 800V; le=80 A 10kA
Ue=AC 800 V; Ie=160 A 10kA
Ue=AC 800 V; Ie=250 A 10kA
Ue=AC 800V; le=315 A 10kA  

Fuse size


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

250   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

12   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  


3 clamp straps 120–240 mm², 3 M10 terminal screws  

Product Weight

3.5   kg

Product Width

205   mm

Product Length

130   mm

Product Height

259.1   mm

Sell Pack Quantity

1   EA

Sell Pack Weight

3.5   kg

Sell Pack Width

208   mm

Sell Pack Length

262.1   mm

Sell Pack Height

133.1   mm