YMA Series / AC Servo Motor / Flat & Hollow Motor Type Collaboration with YASKAWA Electric Corporation



Servo motors that feature our signature compact, flat, and hollow bore structure.

- Compatible with YASKAWA Electric Σ-7 series MECHATROLINK-III communication
- Wide lineup of products with model numbers and rated output from 163 to 1320W
- Specification with brake (option) also available with same dimensions

*Product images are for reference purposes.


  1. Model: YMA series AC servo motor
  2. Motor version symbol:
    • A = Model No. 21A
    • B = Model Nos. 09, 12, 15
  3. Model Nos.: 08, 09, 12, 15, 21A
  4. Brake:
    • A = Without brake
    • B = With brake
  5. Applicable servo driver input voltage: 200 = AC200V
  6. Encoder format: 17 = compliant with YASKAWA format
  7. Encoder type, resolution:
    • 17-bit multi revolution absolute encoder
    • 131072 pulses/revolution
  8. Encoder phase angle:
    • Phase difference between the voltage induced in motor phase U and absolute origin
    • A = standard specification
  9. Connector specification:
    • C = With standard connector
    • N = Without connector
  10. Option symbol:
    • No description = Standard product
    • Y = Cable taken out from side (not supported by model number 21A)
  11. Special specification:
    • No description = Standard product
    • SP = Special specification


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Catalog Series Catalog name PDF
SHA・MMA/PMA/YMA・FHA-C mini・RSF supermini Collaboration Series
【YMA Series】+ YASKAWA Electric Corporation AC SERVOPACK Σ-7 Series New Product News vol.38

Manual / Software

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Manual/Software Type/Series Material name/software name Detailed information English
Manual YMA Series YMA Series Flat Hollow Shaft AC Servo Motors Manual compatible with YASKAWA Electric Σ-7 series

Related products

The servo motor features a hollow and flat structure similar to the main product of the rotary actuator.
The MMA Series models support connection with MELSERVO-J4 amplifiers. They can be used in SSCNET III/H communication networks.
The PMA Series models support connection with MINAS-A6 and A5 amplifiers. They can be used in RTEX and EtherCAT communication networks.


If you have any comments about this product, please contact us using the inquiry form or the nearest sales office.

The academic and general name of "Harmonic Drive®" is "Strain Wave Gearing", and the name "Harmonic Drive®" is a registered trademark that can only be used for products manufactured and sold by the Company.

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