IEC 610004-4:2012 relates to the immunity of electrical and electronic equipment to repetitive electrical fast transients. The document provides immunity requirements and test procedures related to electrical fast transients/bursts, define ranges of test levels and establishes test procedures. The test methods documented in this standard describe a consistent method to assess the immunity of an equipment or system against a defined phenomenon. This third edition cancels and replaces the second edition published in 2004 and its amendment 1 (2010). It contains both the international standard and its redline version.