This part is a kind of semiconductor called A1048.

Function of this product has 2SA1048.

Manufacturers : Toshiba Semiconductor

Image and pinout :

Some of the text within the PDF file :

TOSHIBA Transistor Silicon PNP Epitaxial Type (PCT process) 2SA1048 2SA1048 Audio Frequency Amplifier Applications Unit: mm • Small package • High voltage: VCEO = −50 V (min) • High hFE: hFE = 70~400 • Excellent hFE linearity: hFE (IC = −0.1 mA)/hFE (IC = −2 mA) = 0.95 (typ.) • Low noise: NF = 1dB (typ.), 10dB (max) • Complementary to 2SC2458 Absolute Maximum Ratings (Ta = 25°C) Characteristics Symbol Rating Unit Collector-base voltage VCBO −50 V Collector-emitter voltage VCEO −50 V Emitter-base voltage VEBO −5 V Collector current IC −150 mA Base current IB −50 mA JEDEC ― Collector power dissipation PC 200 mW JEITA ― Junction temperature Storage temperature range Tj 125 °C Tstg −55~125 °C TOSHIBA 2-4E1A Weight: 0.13 [ ... ]

A1048 PDF Datasheet Download