This part is a kind of semiconductor called 3DD4205D.

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

Manufacturers : JILIN SINO

Image and pinout :

Some of the text within the PDF file :

R NPN 型高压功率开关晶体管 HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTOR 3DD4205D 主要参数 IC VCEO PC(TO-126) PC(TO-220) MAIN CHARACTERISTICS 4A 400V 40W 75W 封装 Package 用途 z z z z z 节能灯 电子镇流器 高频开关电源 高频功率变换 一般功率放大电路 APPLICATIONS z Energy-saving ligh 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 www.DataSheet.co.kr 订货信息 ORDER MESSAGE 订 货 型 号 Order codes 3DD4205D-O-M-N-C 3DD4205D-O-Z-N-C 印 记 �� [ ... ]

3DD4205D PDF Datasheet Download