ESD Sensitivity – Classifications – Withstand Voltage

See published article Now Is The Time for ESD Control Programs to be Improved It includes:


  • Part of the challenge may be for the first time needing to handle electronics having a HBM Class 0A withstand voltage. Per the ANSI/ESD S20.20 Foreword: “This standard covers electrical or electronic parts, assemblies and equipment susceptible to damage by electrostatic discharges greater than or equal to 100 volts Human Body Model (HBM).
  • When handling devices susceptible to less than 100 volts HBM, more stringent ESD Control Program Technical Requirements may be required, including adjustment of program Technical Element Recommended Ranges.

ANSI/ESDA/JEDEC JS-001-2011 Table 3. HBM ESD Component Classification Levels

Classification Voltage Range (V)

  • 0A           < 125
  • 0B           125 to < 250
  • 1A           250 to < 500
  • 1B           500 to < 1000
  • 1C           1000 to < 2000
  • 2              2000 to < 4000
  • 3A           4000 to < 8000
  • 3B           ≥ 8000

JESD22-C101C Field-Induced Charged-Device Model Test Method for Electrostatic-Discharge-Withstand Thresholds of Microelectronic Components Table 3

Devices shall be classified as follows:

  • CLASS I       < 200 volts
  • CLASS II      200 to < 500 volts
  • CLASS III     500 to 1000 volts
  • CLASS IV     > 1000 volts

The article lists possible steps one can take to improve their ESD control program; it is an update of what we have online at Class Zero and ESD Control.

There are companies that do ESD simulation and can destructively test a component, sub-assembly, or product to determine the ESD sensitivity or “withstand voltage.” For example, ETS or Electro-Tech Systems at in Glenside, Pennsylvania should be able to perform withstand voltage testing. However, we understand taht most of our customers rely upon classification or withstand voltage documentation from component suppliers and then have a program to protect the very most ESD sensitive item.

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