SB5000 Series - Industrial Shock Block


Special-Purpose Ground-Fault Circuit Interrupter (SPGFCI), Class C and Class D

Industrial Shock Block (ISB) is a personnel protection device designed to meet the requirements for special-purpose GFCIs defined by UL 943C. This standard outlines GFCI classes specifically designed for use in industrial facilities. Class C GFCIs are intended to be used on three-phase systems where the line-to-line voltage is 480 V or less with a trip level of 20 mA, while Class D GFCIs are intended to be used on 600 V systems. The Industrial Shock Block includes DFT harmonic filtering, an automatic self-test feature, and is compliant to the UL 1998 Software in Programmable Components standard.

The Littelfuse Shock Block SB5000 is the only device on the market that:

  • reduces unnecessary tripping by taking advantage of the full inverse time curve and implements DFT filtering;
  • includes NEMA 4X and IP69K enclosure ratingss for all food -preparation environments; and
  • has advanced ground-check features with Zenur termination options, which can identify a crushed cable before the equipment is energized.

For more information, technical specification, and product manuals please visit the SB5000 series on the Littelfuse website.

Video: Learn how to meet GFCI requirements for commercial kitchens.

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