This part is a kind of semiconductor called 2SK4100.

Function of this product has N-Channel Silicon MOSFET.

Manufacturers : Sanyo Semicon Device

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Some of the text within the PDF file :

Ordering number : ENA0778 2SK4100LS SANYO Semiconductors DATA SHEET N-Channel Silicon MOSFET 2SK4100LS Features • • • • General-Purpose Switching Device Applications Low ON-resistance, low input capacitance, ultrahigh-speed switching. Adoption of high reliability HVP process. Attachment workability is good by Mica-less package. Avalanche resistance guarantee. 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 Avalanche Energy (Single Pulse) *3 Avalanche Current *4 Symbol VDSS VGSS IDc*1 IDpack*2 IDP PD Tch Tstg EAS IAV Limited only by maximum temperature SANYO’s ideal heat dissipation con [ ... ]

2SK4100 PDF Datasheet Download