IEC 61000-4-4 is the International Electrotechnical Commission's immunity standard based on electrical fast transient (EFT) / burst transients. This publication is part of the greater IEC 61000 group of standards which is covered under IEC TR 61000-4-1:2016. The current third version of this standard (2012) replaces the second version (2004). The goal of this standard is to establish a common and reproducible reference for evaluating the immunity of electrical and electronic equipment when subjected to electrical fast transient/bursts on supply, signal, control and earth ports. EFT test levels (IEC/EN 61000-4-4)Power ports, earth ports (PE)LevelVoltage peak (kV)Repetition frequency (kHz)1.5 kV5 or 100 kHz21 kV5 or 100 kHz32 kV5 or 100 kHz44 kV5 or 100 kHzxspecialspecialx can be any level specified in product specific standards Note: This tables purpose is a quick overview. It does not contain the same level of detail as the official IEC 61000-4-4.
The cause of electrical fast transients (EFT) come from an arc when mechanical contact is open due to a switching process. Given the fast rise time and voltage of these pulses having a solid ground connection is important during the testing process. Testing for EFT often requires a capacitive coupling clamp (CCL), which is employed to add disturbances to nominal signals.
See also IEC 61000-4-2 IEC 61000-4-5 Electromagnetic pulse Surge protection List of common EMC test standards List of IEC standards List of EN standards
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