AN4275 Datasheet, PDF (1/11 Pages) STMicroelectronics – The objective of this document is to briefly

AN4275
Application note
IEC 61000-4-5 standard overview
Introduction
The objective of this document is to briefly explain the IEC 61000-4-5 standards and to
show the benefits of having a range of protection devices specified according to this
standard. For further details on IEC 61000-4-5 refer to the International Electrotechnical
Commission web site.
Industrial and consumer equipment are subjected to various surges. Here are the main
ones:
 IEC 61000-4-2: ESD surges affect most of consumer equipment. The more stressful ESD
standard is IEC 61000-4-2 (few tens of ns duration) but other standards such as human
body model (HBM), machine model (MM) exist.
 IEC 61000-4-4: This standard is made to check the capability of the equipment to survive
repetitive electrical fast transients and bursts.
 IEC 61000-4-5: Lightning and industrial surges modeled by IEC 61000-4-5. This is the
one we will describe in this document.
 Telecommunication lines are exposed to lightning either directly on the equipment or due
to induced effect because of ground potential change.
In addition to these surges, a telecommunication line may also be disturbed by either power
induction or power contact with main AC lines. Depending on the country, these surges
have been mainly modeled in:
– Telcordia GR-1089 core for America with 2/10 µs and 10/1000 µs surges
– ITU-T K series for the rest of the world with 10/700 µs surges
August 2013
DocID024389 Rev 1
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