This part is a kind of semiconductor called BCR198L3.

Function of this product has PNP Silicon Digital Transistor.

Manufacturers : Infineon Technologies AG

Image and pinout :

Some of the text within the PDF file :

BCR198.../SEMB2 PNP Silicon Digital Transistor • Switching circuit, inverter, interface circuit, driver circuit • Built in bias resistor (R1 = 47k Ω , R2 = 47kΩ ) • For 6-PIN packages: two (galvanic) internal isolated transistors with good matching in one package BCR198/F/L3 BCR198T/W C 3 BCR198S SEMB2 C1 6 B2 5 E2 4 R1 R1 R2 TR2 R1 R2 TR1 R2 1 B 2 E EHA07183 1 E1 2 B1 3 C2 EHA07173 Type BCR198 BCR198F BCR198L3 BCR198S BCR198T BCR198W SEMB2 Marking WRs WRs WR WRs WRs WRs WR 1=B 1=B 1=B 1=B 1=B Pin Configuration 2=E 2=E 2=E 2=E 2=E 3=C 3=C 3=C 3=C 3=C - Package SOT23 TSFP-3 TSLP-3-4 SC75 SOT323 1=E1 2=B1 3=C2 4=E2 5=B2 6=C1 SOT363 1=E1 2=B1 3=C2 4=E2 5=B2 6=C1 SOT666 1 Jun-16-2004 BCR198.../SEMB2 Maximum Ratings Parameter Collector-emitter voltage Collector-base [ ... ]

BCR198L3 PDF Datasheet Download