The 103H7121-5810P with Motor DC, 2-Phase, bipolar Stepper 24VDC, Step 1.8°, 0.55Nm, 3A is a two-phase, bipolar stepper motor manufactured by Sanyo Denki. It operates at 24VDC, has a step angle of 1.8 degrees, a rated torque of 0.55Nm and a maximum rated current of 3A. It is a wide range of applications including automotive, telecommunications, industrial, and medical equipment. It is known for its high torque-to-size ratio and low audible and electrical noise.