c1815lt1-sot-23 transistor of datasheet pdf

C1815LT1-SOT-23
Manufacturer : Weitron Technology
Description : TRANSISTOR???

C1815LT1-SOT-23
Manufacturer : Jiangsu Changjiang Electronics Technology Co., Ltd
Description : TRANSISTOR NPN

C1815LT1-SOT-23
Manufacturer : Jiangsu Changjiang Electronics Technology Co., Ltd
Description : TRANSISTOR??NPN ?