103H7121-7140

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The 103H7121-7140 StepSyn motor is a 2-phase synchronous motor designed to maintain constant speed without slip, features insulation resistance of at least 100 MΩ, and operates across voltages of 100 to 220 VAC. Part of the StepSyn Stepping Motors series by Sanyo Denki, it offers a synchronous pull-out torque range of 0.54 to 5.5 N·m.

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Product Description:

The 103H7121-7140 StepSyn motor is a specialized 2-phase synchronous motor that stands out for its ability to maintain a consistent speed without any slippage. The design allows it to operate efficiently using direct AC power application, especially when transformed from a stepping motor, resulting in ultra-low speed rotation paired with robust torque; additionally, it has an insulation resistance of at least 100 MΩ, tested rigorously at DC 500V under standard temperature and humidity conditions, ensuring operational safety and reliability. It is built to support both clockwise and counterclockwise rotation, making it highly adaptable to many application needs and this motor operates across voltages ranging from 100 to 220 VAC, providing operational flexibility in different power settings.

The StepSyn motor is engineered to withstand challenging electrical environments and can tolerate 50/60Hz, 1 KV AC for 1 minute, with a minimal leakage current that doesn't exceed 1 mA, affirming robust protection for crucial applications. The design ensures stable operation across varying humidity levels, specifically within a range of 20% to 95% RH, avoiding condensation, which enhances its appropriateness for diverse settings. This motor series has versions tailored to accommodate various power needs, offering rated voltage options including 100 VAC, 120 VAC, and 220 VAC, which enhance its integration capability into different power infrastructures; the rated current spans from 0.15 A to 0.9 A, varying by particular model.

Furthermore, the motor offers different levels of torque adapting to specific application demands and the synchronous pull-out torque options extend from approximately 0.54 N·m to 5.5 N·m, providing a good balance between precision and power. With rotational speeds averaging about 72 rpm at 60Hz and 60 rpm at 50Hz, along with options that reach up to rates of 200 or 166 rpm based on model setup, it has become a cornerstone component in industries needing regulated motion.

Ambient humidity
20–95% RH (no condensation)
Capacitor (phase shifter)
1.7–6.75 µF @50/60Hz
Insulation resistance
≥100 MΩ (DC 500V)
Max speed
up to 200 rpm
Motor type
2-phase synchronous
Pull-out torque
0.54–5.5 N·m
Rated current
0.15–0.9 A
Rated voltage
100, 120, 220 VAC
Resistor (phase shift)
180–500 Ω
Rotation direction
CW and CCW
Speed @50Hz
60 rpm
Speed @60Hz
72 rpm
Withstand voltage
1 kV AC, 1 min, ≤1 mA leakage

Frequently Asked Questions about 103H7121-7140:

Q: What insulation resistance does the 103H7121-7140 StepSyn motor offer?

A: The 103H7121-7140 StepSyn motor features an insulation resistance of at least 100 MΩ when tested at DC 500V under normal temperature and humidity.

Q: What voltage options are available for the 103H7121-7140 StepSyn motor?

A: The 103H7121-7140 StepSyn motor is available in versions rated for 100 VAC, 120 VAC, and 220 VAC.

Q: What is the rotational speed of the 103H7121-7140 StepSyn motor?

A: The 103H7121-7140 StepSyn motor operates at approximately 72 rpm at 60Hz and 60 rpm at 50Hz, with some models reaching up to 200 or 166 rpm depending upon configuration.

Q: What is the synchronous pull-out torque range for the 103H7121-7140 StepSyn Stepping Motors series?

A: The synchronous pull-out torque for the 103H7121-7140 StepSyn Stepping Motors series varies by model from around 0.54 N·m to 5.5 N·m.

Q: What applications are suitable for the 103H7121-7140 StepSyn motor?

A: The 103H7121-7140 StepSyn motor is widely used in various industrial applications such as conveyor drives, printers, and cryopumps.


Internal Product Review

  • ‘‘103H7121-7140 StepSyn motor is designed to maintain constant speed without slip. It operates across voltages of 100 to 220 VAC, making it versatile for different power setups.’’

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