This part is a kind of semiconductor called K2161.

Function of this product has 2SK2161.

Manufacturers : Sanyo Semicon Device

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Some of the text within the PDF file :

Ordering number:ENN4601A N-Channel Silicon MOSFET 2SK2161 Ultrahigh-Speed Switching Applications Features · Low ON resistance. · Ultrahigh-speed switching. · Low-voltage drive. · Micaless package facilitating mounting. Package Dimensions unit:mm 2063A [2SK2161] 10.0 3.2 3.5 7.2 4.5 2.8 18.1 16.0 5.6 14.0 1.6 1.2 0.75 1 2 3 2.55 2.4 2.4 0.7 2.55 Specifications Absolute Maximum Ratings at Ta = 25˚C Parameter Drain-to-Source Voltage Gate-to-Source Voltage Drain Current (DC) Drain Current (Pulse) Allowable Power Dissipation Channel Temperature Storage Temperature Symbol VDSS VGSS ID IDP PD Tch Tstg PW≤10µs, duty cycle≤1% Tc=25°C 2.55 2.55 1 : Gate 2 : Drain 3 : Source SANYO : TO-220ML Conditions Ratings 200 ±20 9 36 2.0 25 150 –55 to +150 Uni [ ... ]

K2161 PDF Datasheet Download