This part is a kind of semiconductor called 2SK3892.

Function of this product has Silicon N-channel power MOSFET.

Manufacturers : Panasonic

Image and pinout :

Some of the text within the PDF file :

This product complies with the RoHS Directive (EU 2002/95/EC). Power MOSFETs 2SK3892 Silicon N-channel power MOSFET For contactless relay, diving circuit for a solenoid, driving circuit for a motor, control equipment and switching power supply  Features  Gate-source surrender voltage VGSS : ± 30 guaranteed  Avalanche energy capacity guaranteed: EAS > 986 mJ  High-speed switching: tf = 39 ns  Package  Code TO-220D-A1  Pin Name 1: Gate 2: Drain 3: Source Parameter Symbol VDSS VGSS ID IDP Drain-source surrender voltage Gate-source surrender voltage Drain current Peak drain current Avalanche energy capability * Drain power dissipation Junction temperature Storage temperature EAS PD Tj Ta = 25°C Tstg Note) *: L = 2.67 mH, IL = 22 A, VDD = 50 V, 1 pulse Param [ ... ]

2SK3892 PDF Datasheet Download