This part is a kind of semiconductor called BU3150AF.

Function of this product has NPN Power Transistor.

Manufacturers : Shenzhen Jingdao Electronic

Image and pinout :

Some of the text within the PDF file :

www.DataSheet.co.kr 深圳市晶导电子有限公司 Shenzhen Jingdao Electronic Co.,Ltd. TEL：0755-29799516 FAX：0755-29799515 Http://www.jdsemi.cn BU3150AF *Applications： ◆ ◆ Charger NPN Power Transistor Electronical Ballasts for fluorescent lighting and Switch mode power supplies *Features： ◆ High Current capacity speed B.Base C.Collector E.Emitter ◆ High switching ◆ Wide safe operation area Absolute Maximum Ratings：( Tc=25℃ unless specified) Parameter Collector-Emitter Voltage Collector-Base Voltage Emitter-Base Voltage Collector Current Total Power Dissipation Junction Temperature Storage Temperature Symbol BVCEO BVCBO BVEBO Icm Pcm Tjm Tstg Value ≥ 800 ≥ 1100 ≥9 3 50 150 － 55 ～ 150 Unit V V V A W ℃ ℃ Electronical Characteristic： ( Tc [ ... ]

BU3150AF PDF Datasheet Download