Human-metal model（HMM） and transmission line pulse（TLP） current waveforms are widely used for electrostatic discharge（ESD） protection devices testing. This paper introduced the ESD protection diodes test methods based on these two kinds of waveforms. In the paper

a type of transient voltage suppressor was tested. Transient waveforms

clamping voltage

threshold and transient resistance were obtained. According to the results

IEC 61000-4-2 based HMM test obtains the minimum effective information; TLP-based HMM test can intuitively provide the DUT transient response during ESD; While TLP test result is more repeatable with good repeatability of measured parameters.