This part is a kind of semiconductor called B1406.

Function of this product has 2SB1406.

Manufacturers : Sanyo Semicon Device

Image and pinout :

Some of the text within the PDF file :

Ordering number:EN3470 PNP Epitaxial Planar Silicon Darlington Transistor 2SB1406 Driver Applications Applications · Relay drivers, hammer drivers, lamp drivers, motor drivers. Features · Darlington connection. · High DC current gain. · Large current capacity. Package Dimensions unit:mm 2064 [2SB1406] Specifications Absolute Maximum Ratings at Ta = 25˚C Parameter Symbol Collector-to-Base Voltage Collector-to-Emitter Voltage Emitter-to-Base Voltage Collector Current Collector Current (Pulse) Collector Dissipation Junction Temperature VCBO VCEO VEBO IC ICP PC Tj Storage Temperature Tstg Electrical Characteristics at Ta = 25˚C Conditions Parameter Collector Cutoff Current Emitter Cutoff Current DC Current Gain Gain-Bandwidth Product Collector-to-Emitter Saturation Voltage [ ... ]

B1406 PDF Datasheet Download