This part is a kind of semiconductor called BAV99.

Function of this product has Small Signal Switching Diode.

Manufacturers : Vishay Telefunken

Image and pinout :

Some of the text within the PDF file :

www.vishay.com BAV99 Vishay Semiconductors Small Signal Switching Diode, Dual in Series 3 1 18109 MECHANICAL DATA Case: SOT-23 Weight: approx. 8.8 mg Packaging codes/options: 18/10K per 13" reel (8 mm tape), 10K/box 08/3K per 7" reel (8 mm tape), 15K/box 2 FEATURES • Fast switching speed • High conductance • Surface mount package ideally suited for automatic insertion • Connected in series • AEC-Q101 qualified • Base P/N-E3 - RoHS-compliant, commercial grade • Base P/N-HE3 - RoHS-compliant, AEC-Q101 qualified • Material categorization: For definitions of compliance please see www.vishay.com/doc?99912         PARTS TABLE PART ORDERING CODE BAV99 BAV99-E3-08 or BAV99-E3-18 BAV99-HE3-08 or BAV99-HE3-18 INTERNAL CONSTRUCTION Dual diodes seria [ ... ]

BAV99 PDF Datasheet Download