This part is a kind of semiconductor called A1727.

Function of this product has 2SA1727.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

Transistors 2SA1812 / 2SA1727 / 2SA1776 High-voltage Switching Transistor ( 400V, 0.5A) 2SA1812 / 2SA1727 / 2SA1776 Features 1) High breakdown voltage, BVCEO= 400V. 2) Low saturation voltage, typically VCE (sat) = 0.3V at IC / IB = 3) High switching speed, typically tf : 1 s at IC = 100mA. 4) Wide SOA (safe operating area). 100mA / 10mA. Absolute maximum ratings (Ta=25°C) Parameter Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Collector power dissipation 2SA1812 2SA1727 2SA1776 Junction temperature Storage temperature Symbol VCBO VCEO VEBO IC PC Tj Tstg Limits 400 400 7 0.5 1.0 0.5 2 1 10 1 150 55 to +150 1 Single pulse 2 When mounted on a 40 40 0.7mm ceramic board. 3 When t = 1.7mm and the foil collector area on the PC board is 1cm2 [ ... ]

A1727 PDF Datasheet Download