103H3215-5140 Sanyo Denki
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The Sanyo Denki 103H3215-5140 is a two-phase stepping motor from the StepSyn Stepping Motors series with a frame size of 28 mm square and a step angle of 1.8 degrees. It offers a holding torque of 0.062 Newton-meters and has a rated current of 0.5 Amps per phase. The phase inductance is 3.1 millihenries and phase resistance is 11 Ohms.
Internal Product Review
The 103H3215-5140 is a Sanyo Denki StepSyn stepping motor that stands out for precise 1.8° step angle and efficient 2-phase operation. Rated at 0.5 A per phase with 0.062 N·m holding torque, the motor offers dependable positioning for light-duty motion tasks. A strong choice for compact stepper applications requiring stable electrical performance.
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Product Description:
The 103H3215-5140 is a hybrid stepping motor manufactured by Sanyo Denki as part of the StepSyn Stepping Motors series. In automation cells, it translates pulse trains from microstepping drives into accurate shaft movements, making it suitable for small pick-and-place axes, syringe pumps, and miniature indexing platforms. The motor generates incremental motion without requiring a feedback device, allowing predictable positioning when the applied load remains within its operating capability. Its compact form also supports installation in equipment where available mounting space and moving mass are limited.
Its frame measures only 28 mm square, so the motor can mount directly on small linear slides or laboratory instruments. Despite this compact size, the rotor provides a holding torque of 0.062 N·m when both windings are energized, permitting secure positioning against light process loads. Each full step advances the shaft by 1.8°, resulting in 200 discrete positions per revolution and supporting straightforward drive configuration. Current draw is limited to 0.5 A per phase, allowing the motor to operate with compact drive electronics while controlling heat generation in confined enclosures. The winding has a resistance of 11 Ω, which affects the voltage required to reach the rated phase current. A suitable current-regulated driver can manage winding current during acceleration, holding, and microstepping operation.
Dynamic behavior depends on a coil inductance of 3.1 mH, which influences current rise time and microstepping smoothness at higher pulse rates. The stator is wound for 2 electrical phases, providing the quadrature excitation pattern used by common stepper motor drives. Bipolar current control can energize the phases in sequence to produce forward or reverse rotation without mechanical commutation. The motor belongs to the StepSyn Stepping Motors platform, which includes compact motion products for positioning mechanisms and other controlled-motion assemblies. Acceleration profiles should account for rotor inertia, attached load, and available drive voltage so the shaft can follow the commanded pulse rate without losing synchronization. Holding current may also be reduced after motion stops when the application does not require the full available holding torque, helping limit winding temperature during extended stationary periods.
