DRK..series single-phase motors

The running capacitor integrated in the terminal box is the special feature of our DRK.. single-phase motor. This does not only make the motor especially compact, it also enables application areas up to degree of protection IP66.

The compact single-phase motor with built-in running capacitor

DRK..series single-phase motors
DRK.. series single-phase motors
DRK.. series single-phase motors

Be it in Europe and the USA or in Brazil: you can operate the DRK.. motors in many power supplies because they are available in 50 Hz or 60 Hz with 220 V or 230 V. In total, there are six sizes available in the power range of 0.18 kW to 1.1 kW.

If you do not require a high starting torque in your applications, as is usually the case with fans, pumps or compactors, we recommend the DRK.. with integrated running capacitor. The motor becomes more compact as the running capacitor is housed directly in the terminal box. This means that approx. 45% to 50% of the nominal torque is available for start-up.

With an additional start-up capacitor, the motor is suitable for screw conveyors and conveyor belts as well as for agitators and dosers. You can expect a torque of approx. 100% to 150% of the nominal torque.

It goes without saying that everything fits together for single-phase motors and you can use many additional features of the DR.. modular motor system.

Only half the solution without a gear unit? No problem at all as geared single-phase motors are assembled from an extensive modular concept just like gearmotors.

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  • CAD data and documentation for your configuration
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Your benefits

  • Compact installation possible

    thanks to the running capacitor integrated directly in the terminal box.
  • Splash-water protected

    for all applications which require a high degree of protection, even outdoors.


  • Design with integrated and robust film capacitor as a running capacitor
    • Installed in the terminal box
    • No restriction due to thermal load
    • Protected against mechanical influences
    • For use in buildings and outside, degree of protection IP65, optional surface protection OS2
    • Starting behavior: ~ MA = 45% to 50% MN
  • Design with start-up capacitor provided by the customer
    • Starting behavior: ~ MA = 100% to 150% MN
  • 1x 230 V or 1x 220 V line operation, 50 Hz or 60 Hz frequency
  • Meet the requirements for efficiency class IE1 at 1x 230V / 50 Hz as per IEC 60034-30-1
    (from 1. 7. 2023 the European motor regulation (EU) 2019 / 1781 requires a minimum efficiency class IE2)
  • Available gearmotors with motors of the DRK.. series
    • Helical gearmotors R*07DRK.. to R*97DRK..
    • Parallel-shaft gearmotors F*27DRK.. to F*97DRK..
    • Helical-bevel gearmotors K*19/K*29/K*39DRK.. and K*37DRK.. to K*97DRK..
    • Helical-worm gearmotors S*37DRK.. to S*87DRK..
    • Right-angle gearmotors W*10DRK.. to W*47DRK..

Technical data

DRK.. motor /single-phase motor

Close table
Type Power
Line voltage
DRK71S4 0.18 1x 230 or 1x 220 50 or 60
DRK71M4 0.25 1x 230 or 1x 220 50 or 60
DRK80S4 0.37 1x 230 or 1x 220 50 or 60
DRK80M4 0.55 1x 230 or 1x 220 50 or 60
DRK90M4 0.75 1x 230 or 1x 220 50 or 60
DRK90L4 1.1 1x 230 or 1x 220 50 or 60
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Additional features

Close table
AC motor of the DRK.. series
Size 71, 80, 90
Mounting position S, M, L
Number of poles 4
Output options
Output options /FI, /FF, /FT, /FL, /FG, /FM, /FE, /FY, /FC
Mechanical attachments
Brakes BE05, BE1, BE2
Manual brake release HF, HR
Backstop /RS
Temperature sensor / temperature detection
Thermal motor protection /TF, /TH
Built-in encoder /EI7C, /EI76, /EI72, /EI71
Add-on encoder DR71-90 /ES7S, /ES7R, /ES7C, /AS7W, /AS7Y, /EV7., /AV7., /XV..
Mounting adapter /ES7A, /EG7A, /XV.A
Low noise fan guard /LN
Fan guard /C
Fan /Z, /AL
Forced cooling fan /V
Additional options
2nd shaft end /2W
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Areas of application

  • With integrated running capacitor in
    • Fans
    • Pumps
    • Generators
  • With additional start-up capacitor in
    • Screw conveyors
    • Conveyor belts
    • Agitators
    • Dosers
Other links

Inverter technology


Product overview

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