This part is a kind of semiconductor called D1667.

Function of this product has 2SD1667.

Manufacturers : Sanyo Semicon Device

Image and pinout :

Some of the text within the PDF file :

Ordering number:2091B PNP/NPN Epitaxial Planar Silicon Transistors 2SB1134/2SD1667 50V/5A Switching Applications Applications · Relay drivers, high-speed inverters, and other general high-current switching applications. Features · Low-saturation collector-to-emitter voltage : VCE(sat)=–0.4V max/IC=(–)3A, IB=(–)0.3A. · Micaless package facilitating mounting. Package Dimensions unit:mm 2041A [2SB1134/2SD1667] ( ) : 2SB1134 1 : Base 2 : Collector 3 : Emitter 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 Symbol VCBO VCEO VEBO IC ICP PC Junction Temperature Storage Temperature Tj Tstg Conditions Mounted on ceramic [ ... ]

D1667 PDF Datasheet Download