This part is a kind of semiconductor called BAV23C.

Function of this product has Small Signal Diode.

Manufacturers : MCC

Image and pinout :

Some of the text within the PDF file :

MCC TM Micro Commercial Components
  omponents 20736 Marilla Street Chatsworth    !"# $ %    !"# BAV23/A/C/S Features • Fast Switching Speed • Operating and storage junction temperature range -65OC To 150OC • Epoxy meets UL 94 V-0 flammability rating • Moisture Sensitivity Level 1 • Lead Free Finish/Rohs Compliant (Note1) ("P"Suffix designates Compliant. See ordering information) Maximum Ratings Symbol Parameter VBR Reverse Breakdown Vlotage @ IR=100uA VR Continuous Reverse Voltage VR(RMS) RMS Reverse Voltage IFM RqJA Pd IFSM Forward DC Current at Tamb=25OC Thermal Resistance Junction to Ambient Air Power Dissipation Non-Repetitive Peak Forward Surge Current @ t = 1.0ms @ t = 100ms Rating 250 200 141 225 357 350 9.0 [ ... ]

BAV23C PDF Datasheet Download