This part is a kind of semiconductor called A1541.

Function of this product has 2SA1541.

Manufacturers : Sanyo

Image and pinout :

Some of the text within the PDF file :

Ordering number:EN2440A PNP/NPN Epitaxial Planar Silicon Transistors 2SA1541/2SC3956 High-Definition CRT Display Video Output Applications Applications · High-definition CRT display video output, wide-band amplifier. Features · High gain-bandwidth product : fT=300MHz. · High breakdown voltage : VCEO=200Vmin. · Small reverse transfer capacitance and excellent high frequency characteristics : Cre=2.2pF/NPN, 2.7pF/ PNP. · Complementary PNP and NPN types. · Adoption of FBET process. · Micaless type : TO-126 plastic package. ( ) : 2SA1541 Specifications Absolute Maximum Ratings at Ta = 25˚C Parameter Collector-to-Base Voltage Collector-to-Emitter Voltage Emitter-to-Base Voltage Collector Current Peak Collector Current Collector Dissipation Symbol VCBO VCEO VEBO IC ICP PC Junction [ ... ]

A1541 PDF Datasheet Download