This part is a kind of semiconductor called 45N20.

Function of this product has N-Channel MOSFET Transistor.

Manufacturers : Inchange Semiconductor

Image and pinout :

Some of the text within the PDF file :

INCHANGE Semiconductor isc N-Channel MOSFET Transistor isc Product Specification 45N20 ·FEATURES ·Drain Current ID= 45A@ TC=25℃ ·Drain Source Voltage : VDSS= 200V(Min) ·Static Drain-Source On-Resistance : RDS(on) = 0.065Ω(Max) ·Fast Switching ·APPLICATIONS ·Switch mode power supply. ·ABSOLUTE MAXIMUM RATINGS(Ta=25℃) SYMBOL PARAMETER VALUE UNIT VDSS VGS Drain-Source Voltage Gate-Source Voltage-Continuous 200 ±30 V V ID Drain Current-Continuous 45 A PD Total Dissipation @TC=25℃ 278 W Tj Max. Operating Junction Temperature 150 ℃ Tstg Storage Temperature -55~150 ℃ isc website：www.iscsemi.cn 1 isc & iscsemi is registered trademark PDF pdfFactory Pro www.fineprint.cn INCHANGE Semiconductor isc N-Channel MOSFET Transistor isc Product Specification 45 [ ... ]

45N20 PDF Datasheet Download