This part is a kind of semiconductor called K1449.

Function of this product has 2SK1449.

Manufacturers : Sanyo Semicon Device

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Some of the text within the PDF file :

Ordering number:EN3452 N-Channel Silicon MOSFET 2SK1449 Ultrahigh-Speed Switching Applications Features · Low ON-state resistance. · Ultrahigh-speed switching. Package Dimensions unit:mm 2056A [2SK1449] 2.6 3.5 15.6 14.0 3.2 4.8 2.0 1.6 2.0 1.3 20.0 1.2 15.0 20.0 0.6 1.0 1 0.6 2 3 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 5.45 5.45 1 : Gate 2 : Drain 3 : Source SANYO : TO-3PB Conditions 1.4 Ratings 450 ±30 12 48 120 2.5 150 –55 to +150 Unit V V A A W W ˚C ˚C Electrical Characteristics at Ta = 25˚C [ ... ]

K1449 PDF Datasheet Download