Unipolar Permanent Magnetic Stepper Motor Voltage, torque, speed, current, power and output shaft dimension can be customized. ModelPhase AngleNo. of PhaseVoltage (V)Current (A)Resistance (Ω)Holding Torque (mNm)Rotor Inertia (gcm²)Weight (g) SPU2019-2012184120.15805.90.430 SPU2821-48127.54120.2674519.42.260 SPU3515-48057.5450.51024.55.670 SPU3515-48247.54240.2211029.45.670 SPU3522-2424154240.0639519.64.190 SPU3522-48247.54240.2411039.27.990 SPU4216-2424154240.0928022.54.5100 SPU4216-48247.54240.221104911.5100 SPU4216-48127.54120.81558.811.5100 SPU4222-48127.54120.2450497.8150 SPU4222-48067.5460.320497.8150 SPU5526-48127.54120.3832117.626280