View 2sk118 datasheet:

2SK118 TOSHIBA Field Effect Transistor Silicon N Channel Junction Type 2SK118 General Purpose and Impedance Converter and Unit: mm Condenser Microphone Applications • High breakdown voltage: VGDS = -50 V • High input impedance: I = -1 nA (max) (V = -30 V) GSS GS • Low noise: NF = 0.5dB (typ.) (R = 100 k?, f = 120 Hz) G • Small package Maximum Ratings (Ta = = 25°C) = = Characteristics Symbol Rating Unit Gate-drain voltage VGDS -50 V Gate current IG 10 mA Drain power dissipation PD 100 mW Junction temperature Tj 125 °C Storage temperature range Tstg -55~125 °C JEDEC ? JEITA ? TOSHIBA 2-4E1B Weight: 0.13 g (typ.) Electrical Characteristics (Ta = = 25°C) = = Characteristics Symbol Test Condition Min Typ. Max Unit Gate cut-off current IGSS VGS = -