This part is a kind of semiconductor called BAT14-099R.

Function of this product has Silicon Crossover Ring Quad Schottky Diode.

Manufacturers : Siemens Semiconductor Group

Image and pinout :

Some of the text within the PDF file :

Silicon Crossover Ring Quad Schottky Diode q BAT 14-099R Medium barrier diode for double balanced mixers, phase detectors and modulators ESD: Electrostatic discharge sensitive device, observe handling precautions! Type Marking Ordering Code (tape and reel) Q62702-A0042 Pin Configuration Package1) SOT-143 BAT 14-099R S8 Maximum Ratings per Diode Parameter Forward current Power dissipation, TS ≤ 70 ˚C Storage temperature range Operating temperature range Thermal Resistance per Diode Junction – ambient2) Junction – soldering point Rth JA Rth JS ≤ ≤ Symbol IF Ptot Tstg Top Values 90 100 – 55 … + 150 Unit mA mW – 55 … + 150 ˚C 1020 780 K/W 1) 2) For detailed information see chapter Package Outlines. Package mounted on alumina 15 mm × 16.7 mm to 0.7 mm. Semicon [ ... ]

BAT14-099R PDF Datasheet Download