This part is a kind of semiconductor called D209L.

Function of this product has HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTOR.

Manufacturers : Jilin Sino

Image and pinout :

Some of the text within the PDF file :

NPN 型高压功率开关晶体管 HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTOR R 3DD209L 主要参数 MAIN CHARACTERISTICS IC VCEO PC 12A 400V 120W 封装 Package 用途 z 节能灯 z 电子镇流器 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 Energy-saving light z Electronic ballasts z High frequency switching power supply z High frequency power transform z Commonly power amplifier 产品特性 z高耐压 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 High breakdown voltage z High current capability z High switching speed z High reliability z RoHS product TO-3PN(B) TO-247 订货信息 ORDER MESSAGE 订货型号 Order codes 3DD209L-O-AN-N-B 3DD209L-O-AB-N-B 3DD209L-O-W-N-B 印记 Marking D209L D20 [ ... ]

D209L PDF Datasheet Download