This part is a kind of semiconductor called 2SK3539.

Function of this product has Silicon N-channel MOSFET.

Manufacturers : Panasonic Semiconductor

Image and pinout :

Some of the text within the PDF file :

Silicon MOSFETs (Small Signal) 2SK3539 Silicon N-channel MOSFET Unit: mm (0.425) For switching ■ Features • High-speed switching • Wide frequency band • Gate protection diode built-in 0.3+0.1 –0.0 3 0.15+0.10 –0.05 1.25±0.10 2.1±0.1 5˚ 1 2 (0.65) (0.65) 1.3±0.1 ■ Absolute Maximum Ratings Ta = 25°C Parameter Drain-source voltage Gate-source voltage (Drain open) Drain current Peak drain current Power dissipation Channel temperature Storage temperature Symbol VDS VGSO ID IDP PD Tch Tstg Rating 50 ±7 100 200 150 150 −55 to +150 Unit V V mA mA mW °C °C 10˚ 2.0±0.2 0.9±0.1 0.9+0.2 –0.1 1: Gate 2: Source 3: Drain EIAJ: SC-70 SMini3-G1 Package Marking Symbol: 5F ■ Electrical Characteristics Ta = 25°C ± 3°C Parameter Drain-source surrender voltage D [ ... ]

2SK3539 PDF Datasheet Download