103H7123-0440 Sanyo Denki
Wake Industrial LLC is not an authorized distributor of this product.
The Sanyo Denki 103H7123-0440 is a stepping motor from the StepSyn Stepping Motors series, featuring a basic step angle of 1.8 degrees and a holding torque of 0.83 newton-meters. This motor has a flange size of 56 millimeters square, a motor length of 53.8 millimeters, and a mass of 0.65 kilograms. It uses a lead wire connection type with a rated current of 2 amps per phase and a unipolar winding type.
Internal Product Review
The 103H7123-0440 is a Sanyo Denki StepSyn stepping motor with a 1.8° step angle and 0.83 N·m holding torque. A 2-phase design with unipolar winding gives the motor clean, predictable stepping behavior in positioning duty. Lead wire connection and compact frame sizing make this motor an excellent choice for precise motion applications.
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Product Description:
The 103H7123-0440 is a stepping motor manufactured by Sanyo Denki and supplied under the StepSyn Stepping Motors series. Intended for industrial automation, the motor delivers precise incremental motion without a feedback sensor, allowing machine controllers to advance or hold its position by counting command pulses. Each electrical step produces a fixed amount of rotation, so the device fits pick-and-place actuators, small indexing conveyors, and light metering pumps that require repeatable angular resolution. This open-loop operating method supports controlled movement when the applied load remains within the available torque range.
With a basic step angle of 1.8°, the rotor turns through 200 discrete positions per mechanical revolution, providing the motor’s fundamental resolution. The two stator phases operate at a rated winding current of 2 A per phase. Their unipolar configuration has a resistance of 1.6 Ω per phase and an inductance of 3.8 mH per phase; together, these values establish the electrical time constant that limits the pulse rate. When fully energized, the motor can resist an external load with a holding torque of 0.83 N·m. A rotor inertia of 0.21 × 10⁻⁴ kg·m² keeps the inertial load low, helping the shaft accelerate rapidly toward commanded positions while minimizing overshoot.
Mechanical integration is based on a square flange that measures 56 mm on each side, while the housing has a body length of only 53.8 mm, allowing the unit to fit into compact frames. The housing weighs 0.65 kg, so modest support structures can carry the motor without excessive deflection. The single shaft has a diameter of 6.35 mm and transfers torque directly to pulleys or gears. Lead wires provide the electrical connection without a plug, simplifying routing through cable carriers. Four mounting holes, each measuring 4.5 mm in diameter, are arranged on a 47.14 mm pitch that matches NEMA 23-class brackets.
