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Mersen Fuses - formerly Ferraz Shawmut

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Ferraz Shawmut Class T Fuse Blocks accommodate Class T fuses up to 600A. Insulators are either the durable, glass-filled polycarbonate (GFPC) or phenolic with verified dielectric strength in excess of 2500V. Ferraz Shawmut is the only manufacturer to offer Class T blocks with copper connectors.

Features and Benefits

Unique integral DIN rail adapters for 600V, 30 & 60A blocksFull barrier design (30 & 60A) increases pole to pole safetyUnique adder-block design (30 & 60A) for design flexibilitySpring reinforcing standard for all 30 & 60A clipsFeatures high conductivity copper alloy fuse clipsCool running high amperage (100 - 600A) connectorsCopper connectors available 30 - 600A

Approvals and Compliances

All fuse blocks meet the requirements of UL Std. 512UL Listed, Guide IZLT, File E52283UL Recognized Component, Guide IZLT2, File E52283CSA Certified, Class 6225, File 32169RoHS Compliant

AC Rating

  • 300VAC: 30A, 60A, 100A, 200A, 400A, 600A
  • 600VAC: 30A, 60A, 100A, 200A, 400A, 600A
  • Withstand Rating: 200,000A Symmetrical


E52283 (IZLT.E52283)


6225-01 (032169_0_000)