This part is a kind of semiconductor called BAV21WS.

Function of this product has SURFACE MOUNT FAST SWITCHING DIODE.

Manufacturers : SANGDEST MICROELECTRONICS

Image and pinout :

Some of the text within the PDF file :

SANGDEST MICROELECTRONICS Technical Data Data Sheet N0590, Rev. - BAV19WS- BAV21WS SURFACE MOUNT FAST SWITCHING DIODE Green Products • Weiqi Street, Airport Development Zone, Jiangning District, Nanjing, China 211113  (86) 25-87123907 • • FAX (86) 25-87123900 • World Wide Web Site - http://www.sangdest.com.cn • E-Mail Address - sales@ sangdest.com.cn • SANGDEST MICROELECTRONICS Technical Data Data Sheet N0590, Rev. - BAV19WS- BAV21WS SURFACE MOUNT FAST SWITCHING DIODE Green Products • Weiqi Street, Airport Development Zone, Jiangning District, Nanjing, China 211113  (86) 25-87123907 • • FAX (86) 25-87123900 • World Wide Web Site - http://www.sangdest.com.cn • E-Mail Address - sales@ sangdest.com.cn • SANGDEST MICROELECTRONICS Technical Data Data Sheet N0590, [ ... ]

BAV21WS PDF Datasheet Download