This part is a kind of semiconductor called A1707.

Function of this product has 2SA1707.

Manufacturers : Sanyo Semicon Device

Image and pinout :

Some of the text within the PDF file :

Ordering number:EN3093 PNP/NPN Epitaxial Planar Silicon Transistors 2SA1707/2SC4487 High-Current Switching Applications Features · Adoption of FBET, MBIT processes. · Large current capacity, wide ASO. · Low collector-to-emitter saturation voltage. · Fast switching speed. Package Dimensions unit:mm 2064 [2SA1707/2SC4487] ( ) : 2SA1707 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-Bandwid [ ... ]

A1707 PDF Datasheet Download