DocID024389 Rev 1

9/11

AN4275

Conclusion

5

Conclusion

In most countries it is mandatory to comply with the IEC 61000-4 series.

Most of the protection devices are rated with ESD capability but only a few of them are rated

with the surge corresponding to IEC 61000-4-5. Using the correct protection designed to

comply with IEC 61000-4-5 is an insurance to get reliable equipment and to avoid costly

quality field returns to keep a good brand image.

ST has developed a range of devices rated according to IEC 61000-4-5. For more

information, go to the ST.COM web site and follow the links to the products for power

discretes and modules for protection devices. IEC 61000-4-5 compliant devices are listed

under EOS 8/20 microsecond surge protection (see Figure 9).

Figure 9.

EOS 8/20 µs surge protection

The use of an IEC 61000-4-5 rated protection limits the number of tests to be performed

before certification, saves cost and time and reduces the number of quality returns.