This part is a kind of semiconductor called 2SK3078.

Function of this product has SILICON N CHANNEL MOS TYPE FIELD EFFECT TRANSISTOR.

Manufacturers : Toshiba Semiconductor

Image and pinout :

Some of the text within the PDF file :

2SK3078 TOSHIBA FIELD EFFECT TRANSISTOR SILICON N CHANNEL MOS TYPE 2SK3078 900 MHz BAND AMPLIFIER APPLICATIONS (GSM) (Note)The TOSHIBA products listed in this document are intended for high frequency Power Amplifier of telecommunications equipment.These TOSHIBA products are neither intended nor warranted for any other use.Do not use these TOSHIBA products listed in this document except for high frequency Power Amplifier of telecommunications equipment. Unit: mm z Output Power z Gain z Drain Efficiency : PO = 27.0 dBmW (Min.) : GP = 12.5 dB (Min.) : ηD = 46% (Typ.) ABSOLUTE MAXIMUM RATINGS (Ta = 25°C) CHARACTERISTIC SYMBOL RATING UNIT Drain-Source Voltage Gate-Source Voltage Drain Current Power Dissipation Channel Temperature Storage Temperature Range VDSS VGSS ID PD (Note 1) T [ ... ]

2SK3078 PDF Datasheet Download