This part is a kind of semiconductor called 2SD2167.

Function of this product has Power Transistor.

Manufacturers : Guangdong Kexin Industrial

Image and pinout :

Some of the text within the PDF file :

SMD Type Transistors Power Transistor 2SD2167 Features Built-in zener diode between collector and base. Zener diode has low voltage dispersion. Strong protection against reverse power surges due to low loads. PC=2 W (on 40 40 0.7mm ceramic board) . Absolute Maximum Ratings Ta = 25 Parameter Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Symbol VCBO VCEO VEBO IC Rating 31 4 31 4 5 2 3 Collector power dissipation Junction temperature Storage temperature *1 Pw=20ms , duty=1/2 *2 When mounted on a 40 x 40 x 0.7 mm ceramic board. PC Tj Tstg 0.5 2 150 -55 to +150 A Unit V V V DC) A(Pulse)*1 W W *2 www.kexin.com.cn 1 SMD Type Transistors 2SD2167 Electrical Characteristics Ta = 25 Parameter Collector-base bre [ ... ]

2SD2167 PDF Datasheet Download