This part is a kind of semiconductor called 23HS6403.
Function of this product has 2 Phase Hybrid Stepper Motor.
Manufacturers : MotionKing
Image and pinout :
Some of the text within the PDF file :
MotionKing (China) Motor Industry Co., Ltd. HB Stepper Motor Catalog 2 Phase Hybrid Stepper Motor 23HS series-Size 57mm(1.8 degree) Wiring Diagram: UNI-POLAR(6 LEADS) BI-POLAR(4LEADS) Electrical Specifications: Series Model Step Angle (deg) Motor Length (mm) Rated Phase Phase Holding Detent Rotor Current Resistance Inductance Torque Torque Inertia (A) (ohm) (mH) (N.cm Min) (N.cm Max) (g.cm²) Lead Motor Wire Weight (No.) (g) 23HS0601 1.8 41 1.0 5.2 5.5 23HS0405 1.8 41 0.62 12 24 23HS0408 1.8 41 2.0 1.2 2.5 23HS4412 1.8 45 0.62 12 26 23HS4425 1.8 45 2.5 1.0 2.2 23HS5406 1.8 51 0.62 13 28 23HS5425 1.8 51 2.5 1.2 3.2 23HS5602 1.8 51 0.8 6.8 9.2 23HS6602 1.8 56 1.5 3.2 5.5 23HS6403 1.8 56 2.5 1.3 3.6 23HS6430 1.8 56 3.0 [ ... ]