EMC Question of the Week: October 14, 2019

An Electrical Fast Transient Test in the Clemson EMC Laboratory

The risetime of a single EFT transient is on the order of

  1. picoseconds
  2. nanoseconds
  3. microseconds
  4. milliseconds

Answer

The correct answer is "b". EFT is an acronym for Electrical Fast Transient. EFT tests simulate the transients that can appear on power and signal lines due to the switching of inductive loads. While there are a variety of waveforms that would be classified as EFT transients, they all have minimum transition times on the order of nanoseconds.

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