Store Info



Best sellers

Radiation Rating - ESD Generators and Immunity Testing

This information is a brief overview, please contact us for more details or data.

Rating Summary

The scale is developed based on the results of every esd gun measured (14 models)

  • I - This is the lowest emitting simulators, typically units where HV modules are in base stations not in immediate proximity of DUT.
  • II - ESD guns that emit lower fields both in air and contact mode and the characterized radiation pattern is small. This is the lowest possible rating for handheld simulators with HV modules in the pistol.
  • III - ESD guns that measured higher field strengths, typically 10-25% more than I and II rated units.
  • IIII - ESD guns that measured higher field strengths, typically 25-50% more than I and II rated units.
  • IIIII - ESD guns that measured higher field strengths, >50% more than I and II rated units.



Radiation levels are correlated to the location of HV modules. There are two categories of electrostatic discharge generators base on voltage capability; 15/16kV and 30kV. All current 15/16kV models besides Noiseken are handheld pistols, 30kV ESD guns have two types, handheld and systems (with a separate base-station tethered to the ESD pistol). In general, the base-stations emitted less at the test point - but there were exceptions.
  1. 15/16kV Units
  2. 30kV Handheld ESD Guns
  3. 30kV Systems

ESD Immunity Generators:

Overview, a division of The EMC Shop has established an ESD Radiation Scale levels 1 through 5, 1 being the lowest, 5 being the highest based on a variety of field strength measurements taken by each ESD gun. The largest weight factor was the field strength measured at the test tip during test sequences. Contact discharges emit different levels of radiation than air discharges in most units, and weighted more than air measurements. 


Why does it matter?

You may get failures from the radiation and not the conducted discharge. It could also cause nearby electronics to fail.