This part is a kind of semiconductor called BCW71.

Function of this product has NPN general purpose transistors.

Manufacturers : NXP

Image and pinout :

Some of the text within the PDF file :

DISCRETE SEMICONDUCTORS DATA SHEET ook, halfpage M3D088 BCW71; BCW72 NPN general purpose transistors Product data sheet Supersedes data of 1997 Mar 06 1999 Apr 19 NXP Semiconductors NPN general purpose transistors Product data sheet BCW71; BCW72 FEATURES • Low current (100 mA) • Low voltage (45 V) • Low noise. APPLICATIONS • General purpose switching and amplification. PINNING PIN 1 2 3 base emitter collector DESCRIPTION DESCRIPTION NPN transistor in a SOT23 plastic package. PNP complements: BCW69 and BCW70. MARKING TYPE NUMBER BCW71 BCW72 MARKING CODE(1) K1∗ K2∗ Note 1. ∗ = p : Made in Hong Kong. ∗ = t : Made in Malaysia. handbook, halfpage 3 1 Top view 1 2 MAM255 3 2 Fig.1 Simplified outline (SOT23) and symbol. LIMITING VALUES In accordance with the A [ ... ]

BCW71 PDF Datasheet Download