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:  Canada / English
Contact us

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 1 315A 3-pole switching Bottom Fitting/panel Clamp Strap / Screw M12  

EAN/UPC code



50 ... 60   Hz

Rated voltage AC IEC

800   V

Rated current

315   A

Utilization Category

AC 23 B @ Ue = AC 400 V; Ie = 315 A  

Utilization Category

AC 22 B @ Ue = AC 500 V; Ie = 315 A  

Utilization Category

AC 21 B @ Ue = AC 690 V; Ie = 315 A  

Utilization Category

AC 21 B @ Ue = 800 V; Ie = 315 A  


3-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 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

315   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

15   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  

Product Weight

5.13   kg

Product Width

256   mm

Product Length

148.9   mm

Product Height

299   mm

Sell Pack Quantity

1   EA

Sell Pack Weight

5.13   kg

Sell Pack Width

265   mm

Sell Pack Length

325   mm

Sell Pack Height

155   mm