This part is a kind of semiconductor called BD238.

Function of this product has Low voltage PNP power transistor.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

BD238 Low voltage PNP power transistor Features ■ Low saturation voltage ■ PNP transistor )Applications t(s■ Audio, power linear and switching applications roducDescription PThe device is manufactured in planar technology tewith “Base Island” layout. The resulting transistor shows exceptional high gain performance lecoupled with very low saturation voltage. soThe NPN type is BD237. 1 2 3 SOT-32 (TO-126) Figure 1. Internal schematic diagram Obsolete Product(s) - ObTable 1. Device summary Order code Marking Package Packaging BD238 BD238 SOT-32 Tube June 2009 Doc ID 15786 Rev 1 1/9 www.st.com 9 Absolute maximum ratings 1 Absolute maximum ratings BD238 Table 2. Absolute maximum ratings Symbol Parameter Value Unit VCBO Collector-base voltage (IE = 0) -100 V [ ... ]

BD238 PDF Datasheet Download