This is one of the semiconductor types. This part name is K2638.
This product has 2SK2638 functions.
Manufacturers of product is Fuji Electric.
Image and pinout :
K2638 PDF Datasheet
Some of the text files within the PDF file
2SK2638-01MR FAP-IIS Series > Features High Speed Switching Low On-Resistance No Secondary Breakdown Low Driving Power High Voltage VGS = ± 30V Guarantee Repetitive Avalanche Rated N-channel MOS-FET 450V 0,65Ω 10A 50W > Outline Drawing > Applications – Switching Regulators – UPS – DC-DC converters – General Purpose Power Amplifier > Maximum Ratings and Characteristics – Absolute Maximum Ratings T( C=25°C), unless otherwise specified > Equivalent Circuit Rating 450 10 40 ±30 10 86,2 50 150 -55 ~ +150 Unit V A A V A mJ W °C °C Item Drain-Source-Voltage Continous Drain Current Pulsed Drain Current Gate-Source-Voltage Repetitive or Non-Repetitive (Tch ≤ 150°C) Avalanche Energy Max. Power Dissipation Operating and Storage Temperature Range Symbol V DS ID I D(puls) V GS I AR E AS PD T ch T stg – Electrical Characteristics (TC=25°C), Item Drain-Source Breakdown-Voltage Gate Threshhold Voltage Zero Gate Voltage Drain Current Gate Source Leakage Current [ … ]
Please refer to the file for details.