View 2sk3019 datasheet:

Transistor Small switching (30V, 0.1A) 2SK3019 FFeatures FExternal dimensions (Units: mm) 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 FEquivalent circuit MOSFET FAbsolute maximum ratings (Ta = 25_C) 174 Transistor 2SK3019 FElectrical characteristics (Ta = 25_C) 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 St