This part is a kind of semiconductor called BCP53-16.

Function of this product has PNP medium power transistors.

Manufacturers : NXP

Image and pinout :

Some of the text within the PDF file :

DISCRETE SEMICONDUCTORS DATA SHEET book, halfpage M3D087 BCP51; BCP52; BCP53 PNP medium power transistors Product specification Supersedes data of 1997 Apr 08 1999 Apr 08 Philips Semiconductors Product specification PNP medium power transistors FEATURES • High current (max. 1 A) • Low voltage (max. 80 V) • Medium power (max. 1.3 W). APPLICATIONS • Audio, telephony and automotive applications • Thick and thin-film circuits. DESCRIPTION PNP medium power transistor in a SOT223 plastic package. NPN complements: BCP54, BCP55 and BCP56. 1 Top view handbook, halfpage BCP51; BCP52; BCP53 PINNING PIN 1 2, 4 3 base collector emitter DESCRIPTION 4 2, 4 1 3 2 3 MAM288 Fig.1 Simplified outline (SOT223) and symbol. LIMITING VALUES In accordance with the Absolute Maximum Rating Sys [ ... ]

BCP53-16 PDF Datasheet Download