This part is a kind of semiconductor called BTS840S2.

Function of this product has Smart High-Side Power Switch Two Channels: 2 x 30m Current Sense.

Manufacturers : Infineon Technologies AG

Image and pinout :

Some of the text within the PDF file :

PROFET® BTS 840 S2 Smart High-Side Power Switch Two Channels: 2 x 30mΩ Current Sense Product Summary Operating Voltage Vbb(on) Active channels: On-state Resistance RON Load Current (ISO) IL(ISO) Current Limitation IL(SCr) one 30mΩ 12A 24A 5.0...34V two parallel 15mΩ 24A 24A Package P-DSO-20-12 (Power SO 20) General Description • • N channel vertical power MOSFET with charge pump, ground referenced CMOS compatible input,  diagnostic feedback and proportional load current sense monolithically integrated in Smart SIPMOS technology. Providing embedded protective functions Applications • • • • µC compatible high-side power switch with diagnostic feedback for 12V and 24V grounded loads All types of resistive, inductive and capacitve loads Most suitable for loads with hi [ ... ]

BTS840S2 PDF Datasheet Download