This part is a kind of semiconductor called 103H7123-5040.
Function of this product has 2-phase Stepping Motor.
Manufacturers : ETC
Image and pinout :
Some of the text within the PDF file :
2-phase stepping motor 2-phase Stepping Motor 56mm sq. 103H712 1.8˚/step For information on the applicable driver, contact our sales department. Specifications Unipolar winding Model One shaft 103H7121-0140 103H7121-0440 103H7121-0740 103H7123-0140 103H7123-0440 103H7123-0740 103H7124-0140 103H7124-0440 103H7124-0740 103H7126-0140 103H7126-0440 103H7126-0740 Two shafts -0110 -0410 -0710 -0110 -0410 -0710 -0110 -0410 -0710 -0110 -0410 -0710 Holding torque at Rated Wiring 2-phase energization current resistance N.m or more 0.39 0.39 0.39 0.83 0.83 0.78 0.98 0.98 0.98 1.27 1.27 1.27 A/phase Ω/phase 1 2 3 1 2 3 1 2 3 1 2 3 4.8 1.25 0.6 6.7 1.6 0.77 7 1.7 0.74 8.6 2 0.9 Wiring inductance mH/phase 8 1.9 0.8 15 3.8 1.58 12.5 3.1 1.4 19 4.5 2.2 Rotor inertia x10 -4kg· [ ... ]