This part is a kind of semiconductor called A1746.

Function of this product has 2SA1746.

Manufacturers : Sanken

Image and pinout :

Some of the text within the PDF file :

2SA1746LOW VCE (sat) Silicon PNP Epitaxial Planar Transistor Application : Chopper Regulator, Switch and General Purpose sAbsolute maximum ratings (Ta=25°C) Symbol 2SA1746 Unit VCBO –70 V VCEO –50 V VEBO –6 V IC –12(Pulse–20) A IB –4 A PC 60(Tc=25°C) W Tj 150 °C Tstg –55 to +150 °C sElectrical Characteristics Symbol Conditions ICBO VCB=–70V IEBO V(BR)CEO VEB=–6V IC=–25mA hFE VCE=–1V, IC=–5A VCE(sat) IC=–5A, IB=–80mA VBE(sat) IC=–5A, IB=–80mA fT VCE=–12V, IE=1A COB VCB=–10V, f=1MHz (Ta=25°C) 2SA1746 Unit –10max µA –10max µA –50min V 50min –0.5max V –1.2max V 25typ MHz 400typ pF sTypical Switching Characteristics (Common Emitter) VCC RL IC VBB1 VBB2 IB1 (V) (Ω) (A) (V) (V) (mA) [ ... ]

A1746 PDF Datasheet Download