This part is a kind of semiconductor called A1815.

Function of this product has PNP Epitaxial Planar Silicon Transistor.

Manufacturers : Sanyo Semicon Device

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Some of the text within the PDF file :

Ordering number:EN4625 PNP Epitaxial Planar Silicon Transistor 2SA1815 FM, RF, MIX, IF Amplifier, High-Frequency General-Purpose Amplifier Applications Features · High power gain : PG=25dB (f=100MHz). · High cutoff frequency ; fT=750MHz typ. · Low collector-to-emitter saturation voltage. · Complementary pair with the 2SC4432. Package Dimensions unit:mm 2018A [2SA1815] C : Collector B : Base E : Emitter Specifications Absolute Maximum Ratings at Ta = 25˚C Parameter Collector-to-Base Voltage Collector-to-Emitter Voltage Emitter-to-Base Voltage Collector Current Collector Dissipation Junction Temperature Storage Temperature Symbol VCBO VCEO VEBO IC PC Tj Tstg Conditions SANYO : CP Ratings –15 –12 –3 –50 250 150 –55 to +150 Unit V V V mA mW ˚C ˚C Electrical Charac [ ... ]

A1815 PDF Datasheet Download