This part is a kind of semiconductor called 2SK30.

Function of this product has Small switching (30V/ 0.1A).

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

Transistor Small switching (30V, 0.1A) 2SK3019 FFeatures 1) Low on-resistance. 2) Fast switching speed. 3) Low voltage drive (2.5V) makes this device ideal for portable equipment. 4) Easily designed drive circuits. 5) Easy to parallel. FApplications Interfacing, switching (30V, 100mA) FStructure Silicon N-channel MOSFET FAbsolute maximum ratings (Ta = 25_C) FExternal dimensions (Units: mm) FEquivalent circuit 174 Transistor FElectrical characteristics (Ta = 25_C) 2SK3019 FPackaging specifications FElectrical characteristic curves Fig.1 Typical output characteristics Fig.2 Typical transfer characteristics Fig.3 Gate threshold voltage vs. channel temperature 175 Transistor 2SK3019 Fig.6 Static drain-source on-state resistance vs. gate-source voltage Fig.7 Static drain-source [ ... ]

2SK30 PDF Datasheet Download