This part is a kind of semiconductor called A1873.

Function of this product has 2SA1873.

Manufacturers : Toshiba

Image and pinout :

Some of the text within the PDF file :

TOSHIBA Transistor Silicon PNP Epitaxial Type (PCT process) 2SA1873 2SA1873 Audio Frequency General Purpose Amplifier Applications • Small package (dual type) • High voltage and high current: VCEO = −50 V, IC = −150 mA (max) • High hFE • Excellent hFE linearity: hFE (IC = −0.1 mA)/hFE (IC = −2 mA) = 0.95 (typ.) • Complementary to 2SC4944 Unit: mm Absolute Maximum Ratings (Ta = 25°C) (Q1, Q2 common) Characteristics Symbol Rating Unit Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Base current Collector power dissipation VCBO VCEO VEBO IC IB PC (Note 1) −50 −50 −5 −150 −30 200 V V V mA mA mW Junction temperature Tj 125 °C JEDEC ― Storage temperature range Tstg −55~125 °C JEITA ― Note: Using [ ... ]

A1873 PDF Datasheet Download