This post explains for the semiconductor A1930.
The Part Number is A1930.
The function of this semiconductor is 2SA1930.
Manufacturers : Toshiba Semiconductor
Preview images :
2SA1930 TOSHIBA Transistor Silicon PNP Epitaxial Type 2SA1930 Power Amplifier Applications Driver Stage Amplifier Applications Unit: mm • • High transition frequency: fT = 200 MHz (typ.) Complementary to 2SC5171 Absolute Maximum Ratings (Tc = 25°C) Characteristics Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Base current Collector power dissipation Junction temperature Storage temperature range Ta = 25°C Tc = 25°C Symbol VCBO VCEO VEBO IC IB PC Tj Tstg Rating −180 −180 −5 −2 −1 2.0 20 150 −55 to 150 Unit V V V A A W °C °C JEDEC JEITA TOSHIBA ― SC-67 2-10R1A Note: Using continuously under heavy loads (e.g. the application of high Weight: 1.7 g (typ.) temperature/current/voltage and the significant change in temperature, etc.) may cause this product to decrease in the reliability significantly even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute maximum ratings. […]