On Tue, 27 Jan 2009 06:13:23 +1100, Franc Zabkar
put finger to keyboard and composed:

The above discussion refers to this photo of a Seagate HDD with two
TVS devices made by ON Semiconductor:
http://forum.hddguru.com/download/file.php?id=562

The parts have the following markings:

ON logo QE
R617

ON logo 620
LEM .

600 Watt Peak Power Zener Transient Voltage Suppressor, 12V,
Unidirectional, p/n SMBJ12AON (marking = LEM):
http://www.icbase.com/English/ic_sea...NS26380605.pdf

The "QE" marking belongs to a 1SMA5.0AT3, 400 Watt Peak Power Zener
Transient Voltage Suppressor:
http://www.datasheetarchive.com/pdf-...SA-454313.html

ON TVS/Zener Device Data Book:
http://www.mosaico-eng.com.br/arquiv...et%20Zener.pdf

- Franc Zabkar
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