This part is a kind of semiconductor called BSP350.

Function of this product has MiniPROFET(High-side switch Short-circuit protection Overtemperature protection with hysteresis).

Manufacturers : Infineon Technologies AG

Image and pinout :

Some of the text within the PDF file :

Mini PROFET® BSP 350 • High-side switch • Short-circuit protection • Overtemperature protection with hysteresis • Overload protection • Overvoltage protection • Reverse battery protection1) • Switching inductive load • Clamp of negative output voltage with inductive loads • Maximum current internally limited Package: SOT 223 Type Ordering code Q67000-S227 Pins: 1 IN 2 Vbb 3 OUT MiniPROFET 4 3 2 1 4 Vbb BSP 350 Maximum Ratings Parameter Supply voltage Load current self-limited Maximum current through input pin (DC) see internal circuit diagram Symbol Values Vbb 50 IL IL(SC) IIN ±15 Unit V A mA mJ °C W K/W Inductive load switch-off energy dissipation Operating temperature range Storage temperature range Max. power dissipation (DC)2) TA = 25 °C Thermal resistanc [ ... ]

BSP350 PDF Datasheet Download