GB\/ 1766.5-1999 \"Electromagnetic Compatibility Test and measurement technology Surge (impact) immunity Test\" for 1.2\/50μS & The parameters of the 8\/20μS mixed waveform are specified as follows:
Open-circuit voltage waveform: Wavefront time: 1.2±30% μS Half-peak time: 50±20%μS Short-circuit current waveform: wavefront time: 8±20%μS half-peak time: 20±20%μS reverse overrush: < 30%