IEC 61000-4-2 is the International Electrotechnical Commission's immunity standard on electrostatic discharge (ESD).
The publication describes requirements, levels and test methods to achieve immunity compliance of an electronic product.
The purpose is to create a reproducible ground for product compliance and the standard defines: ranges, levels, test equipment, setups, procedures, calibrations, generator waveforms and general uncertainties.
The intention is not to define product specific tests but instead establish a basic common reference.
The standard describes the output RC-network of the generator as having typical values of 330 Ω and 150 pF.