This part is a kind of semiconductor called TIP122.
Function of this product has NPN EPITAXIAL DARLINGTON TRANSISTOR.
Manufacturers : JILIN SINO
Image and pinout :
Some of the text within the PDF file :
NPN 型外延达林顿晶体管 NPN EPITAXIAL DARLINGTON TRANSISTOR R TIP122 主要参数 MAIN CHARACTERISTICS 封装 Package IC VCEO PC(TO-220C) 5A 100V 65W 用途 z 发动机点火 z 高频开关电源 z 高频功率变换 z 一般功率放大电路 APPLICATIONS z Engine ignition z High frequency switching power supply z High frequency power transform z Commonly power amplifier circuit 产品特性 z与 TIP127 互补 z高电流容量 z高开关速度 z高可靠性 z环保（RoHS）产品 FEATURES z Complementary to TIP127 z High current capability z High switching speed z High reliability z RoHS product TO-220C 订货信息 ORDER MESSAGE 订货型号 Order codes TIP122-O-C-N-B 印记 Marking TIP122 无卤素 Halogen Free 否 NO 封装 Package TO-220C 包装 Packaging 条� [ ... ]