This part is a kind of semiconductor called BAV23C.

Function of this product has Dual high-voltage switching diodes.

Manufacturers : NXP

Image and pinout :

Some of the text within the PDF file :

BAV23 series Dual high-voltage switching diodes Rev. 07 19 March 2010 Product data sheet 1. Product profile 1.1 General description Dual high-voltage switching diodes, encapsulated in small Surface-Mounted Device (SMD) plastic packages. Table 1. Product overview Type number Package NXP BAV23A SOT23 BAV23C SOT23 BAV23S SOT23 BAV23 SOT143B JEDEC TO-236AB TO-236AB TO-236AB - Configuration dual common anode dual common cathode dual series dual isolated 1.2 Features and benefits  High switching speed: trr  50 ns  Low leakage current  Repetitive peak reverse voltage: VRRM  250 V  Low capacitance: Cd  2 pF  Small SMD plastic package 1.3 Applications  High-speed switching at high voltage  High-voltage general-purpose switching 1.4 Quick refere [ ... ]

BAV23C PDF Datasheet Download