Size 15 Unipolar Stepper Motor Specification Step Angle Step Rate Voltage Power Km Running Torque Holding Torque Kt Holding Torque Unpowered Torque Phase Resistance Phase Inductance Number of Phases/Poles Redundant Windings Weight -201 90 150 24 8.5 0.75 1.2 6.25 2.2 0.55 68 17 4/2 Yes 0.5 -202 90 150 12 8.5 0.75 1.2 3.1 2.2 0.55 17 5.6 4/2 Yes 0.5 Units degrees pps VDC watts in-ozâwatts in-oz in-oz/amp in-oz in-oz ohms mH phase/poles windings pounds Basis Nominal Maximum Nominal Nominal Nominal Minimum Nominal Minimum Minimum Nominal Nominal By Design By Design Nominal For the very latest specifications visit www.aeroflex.com/Motion