This part is a kind of semiconductor called BTS621L1E3230.

Function of this product has Smart Two Channel Highside Power Switch.

Manufacturers : Infineon Technologies AG

Image and pinout :

Some of the text within the PDF file :

PROFET® BTS621L1 Smart Two Channel Highside Power Switch • Overload protection • Current limitation • Short circuit protection • Thermal shutdown • Overvoltage protection (including load dump) • Fast demagnetization of inductive loads • Reverse battery protection1) • Undervoltage and overvoltage shutdown with auto-restart and hysteresis • Open drain diagnostic output • Open load detection in ON-state • CMOS compatible input • Loss of ground and loss of Vbb protection • Electrostatic discharge (ESD) protection Features Product Summary Overvoltage protection Operating voltage Vbb(AZ) Vbb(on) 43 5.0 ... 34 both V V channels: On-state resistance RON Load current (ISO) IL(ISO) Current limitation IL(SCr) each parallel 100 50 mΩ 4.4 8.5 A 8 8 A TO-220AB/7 7 [ ... ]

BTS621L1E3230 PDF Datasheet Download