This part is a kind of semiconductor called PM42L-048-17.

Function of this product has Wantai Mini Stepper.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

Wantai Mini Stepper Product Specifications PM42L-048-17 General Specifications Item Step Accuracy Temperature Rise Ambient Temperature Insulation Resistance Dielectric Strength Specification ±7% 80°C Max -20°C~+50°C 100MΩ Min., 500VDC 500 VAC for one minute Electrical Specifications Model No. Step Angle ° PM42L-048-17 7.5 4 No. of Phase Rated Voltage V 12 Rated Current A 0.28 Phase Phase Resistance Inductance Ω 43 mH 27 Holding Torque g-cm 950 6 # of Leads Detent Torque g-cm 120 Weight g 138 Mechanical Dimensions Free Datasheet http://www.datasheet-pdf.com/ YELLOW RED ORANGE RED BLACK BLUE Free Datasheet http://www.datasheet-pdf.com/ [ ... ]

PM42L-048-17 PDF Datasheet Download