This part is a kind of semiconductor called A1703.

Function of this product has 2SA1703.

Manufacturers : Sanyo

Image and pinout :

Some of the text within the PDF file :

Ordering number:EN3023 PNP/NPN Epitaxial Planar Silicon Transistor 2SA1703/2SC4483 Low-Frequency Amplifier, Electronic Governor Applications Features · Low collector-to-emitter saturation voltage. Package Dimensions unit:mm 2064 [2SA1703/2SC4483] ( ) : 2SA1703 Specifications Absolute Maximum Ratings at Ta = 25˚C Parameter Collector-to-Base Voltage Collector-to-Emitter Voltage Emitter-to-Base Voltage Collector Current Collector Current (Pulse) Collector Dissipation Junction Temperature Storage Temperature Symbol VCBO VCEO VEBO IC ICP PC Tj Tstg Electrical Characteristics at Ta = 25˚C Conditions Parameter Symbol Conditions Collector Cutoff Current Emitter Cutoff Current DC Current Gain Gain-Bandwidth Product ICBO IEBO hFE1 hFE2 fT VCB=(–)20V, IE=0 VEB=(–)4V, IC=0 VCE=( [ ... ]

A1703 PDF Datasheet Download