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August 2013 DocID024389 Rev 1 1/11
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
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