103H5208-0410 Sanyo Denki
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The Sanyo Denki 103H5208-0410 StepSyn Stepping Motor features a unipolar coil type and a holding torque of 0.3 N·m. This motor from the StepSyn Stepping Motors series has a frame size of 42 mm square and a step angle of 1.8 degrees per step. It weighs 0.29 kg and has a rated current of 1.2 A per phase.
Internal Product Review
The 103H5208-0410 is a Sanyo Denki StepSyn stepping motor with unipolar coil construction and a 1.8° step angle. Holding torque of 0.3 N·m and rated current of 1.2 A/phase support efficient positioning in compact motion systems. A well-balanced motor selection for precise indexing and stable step response.
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Product Description:
The 103H5208-0410 is a medium-frame stepping motor supplied by Sanyo Denki within the StepSyn Stepping Motors series. It translates pulse commands from an indexer or PLC into incremental shaft rotation, allowing deterministic positioning in pick-and-place units, labelers, laboratory instruments, and compact conveyors. Because motion is determined by the commanded step count rather than feedback, the motor offers a simple open-loop motion solution for equipment that requires repeatable point-to-point movement without encoders or servo tuning. Its compact housing simplifies installation in space-constrained equipment.
The motor has a square frame measuring 42 mm across, a standard footprint that simplifies mounting to linear stages. Its rotor advances 1.8° per step, so 200 full-step pulses complete one revolution and permit straightforward microstepping ratios. The windings draw 1.2 A per phase and have a resistance of 2.9 Ω per phase, resulting in winding heat that must be removed by natural convection. A phase inductance of 3.4 mH per phase slows current changes, so chopper drives need sufficient voltage overhead for rapid torque development. Six motor leads provide wiring access, the overall motor length is 39 mm, and the shaft extends 24 mm beyond the front face.
The static output capability reaches 0.3 N·m of holding torque when the rated current is applied, providing sufficient stall resistance for light loads without a gearbox. The shaft has a diameter of 5 mm, and a keyed or compression-fit hub should match this dimension to prevent loosening during rapid indexing cycles. With a mass of 0.29 kg, the rotor-stator assembly adds minimal load to small gantries, while the low rotor inertia of 0.056 × 10⁻⁴ kg·m² helps the axis accelerate quickly under microstepped control. The available unipolar drive mode lets compatible drivers energize half-windings for reduced inductance when high-speed movement is required.
