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Approvals & Standards

  • All class J fuse blocks meet the requirements of UL4248 (formerly UL512)
  • UL listed Guide IZLT, File E52283
  • CSA certified class 6225, File 32169

Key features & benefits

Mersen’s new Generation 2 open style class J fuse blocks accommodate class J fuses ranging from 0-100A, 600V. A choice of screw, pressure plate, and box connectors fit a wide range of stranded or solid wire. Gen2 fuse blocks are DIN-rail mountable, more compact than the traditional offering, and feature dovetail nesting for multipole field assembly. Fuse bases are IP20 rated when paired with Mersen’s newly designed dead front covers.

More specifications


  • Branch circuits
  • Control panels
  • Load centers
  • Lighting, heating, & general loads

Product Specifications

Item Number



Fuse Block 600VAC 600VDC Class J 100A 3-Pole Box  

EAN/UPC code


Rated voltage AC UL

600   V

Rated voltage DC UL

600   V


50/60   Hz

Rated current

100   A

ROHS Compliant


AC or DC


Fuse class

Class J  

Short Circuit Current Rating (SCCR)

200   kA

Fuse Type/Class

Class J  

Number of Poles


Wiring range


Contact materials

Tin-Plated Copper  

Connection/Terminal Type


Fuse Installation Method


Body/Insulating Material

Glass Filled Polycarbonate  

Max Fuse Rated Current

100   A

Installation Mounting

Direct Screw Mount  

Product Weight

0.6305   kg

Product Width

144.8   mm

Product Length

135.9   mm

Product Height

73.2   mm

Sell Pack Quantity

3   EA

Sell Pack Weight

1.9858   kg

Sell Pack Width

438.2   mm

Sell Pack Length

73.2   mm

Sell Pack Height

139.7   mm