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TVS components offer lightning and over-voltage protection

30 Jan 2014

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A new set of surface mount transient voltage suppressor (TVS) components can protect relay drives, motor back electromagnetic fields and related devices from over-voltage as well as mitigate the secondary effects of lightning in AC/DC power lines. The high-powered SM15KPAN series from ProTek Devices are currently sold in mass quantities starting at $7.75 in 100-unit orders for unidirectional parts and $8.50 for bidirectional parts.

The TVS component line from ProTek Devices, which range from SM15KPA17AN to SM15KPA220CAN, have rated stand-off voltages from 17V to 220V to suit a wide variety of design requirements. They provide 15,000W of peak pulse power dissipation for a 10/1000 microamps waveform. They are also compatible with IEC 61000-4-5 (surge): 48A, 8/20 microamps—L3 (line-ground), L4 (line-line) and L1 (power).

The components allow unidirectional and bidirectional configurations as well as easy mounting to a printed circuit board. The clamping time is <100ps theoretical for unidirectional and 5ns for bidirectional. The RoHS-compliant products are provided in a high power surface mount package with an approximate weight of only 1.2g. The package also has lead-free silver plating. The solder reflow temperature is 240-250℃ and the flammability rating is UL 94V-0.

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