Product Type: Rotary


Johnson Electric’s BTA actuator platform offers high speed controllability in rotary stroke applications. The BTA has a single phase coil with three stator poles and matching rotor pole. When the coil is energized, the poles align along the flux path. The three pole design allows a stroke of up to 45°. Since BTA technology does not require full stroke actuation, stops can be used to attain maximum life as well as optimum stroke / torque capacity.

Using simple pulse width modulation to control coil current, the BTA allows open or closed loop velocity and maximum position control. The BTA platform offers quiet operation due to the soft, shock-free cycling which eliminates the noise associated with end-of stroke mechanical stops. Very quiet operation, long life in excess of 100 million actuations and high power density make the BTA product family ideal for high speed, high throughput diverting and sorting applications that require low noise and zero downtime.


  • Medical
    • Air Flow Control
    • Process Path for Blood Analyzers
  • Industrial
    • Robotic Clamp Actuator


Developed for applications requiring high speed and higher torque motion control, the Ultimag platform is substantially faster than other solenoids.

Johnson Electric’s Ultimag® rotary actuator technology offers a bidirectional, center return function not found in traditional rotary solenoids. The Ultimag platform is substantially faster than other solenoids, and can be operated in an on/off mode or proportionally, in both open and closed loop systems.  Ultimag actuators offer a 45° stroke; however, the design is capable of a maximum stroke of 160°. For shorter strokes, electronic or mechanical stops can be used. This technology is ideal for applications requiring high speed and high torque motion control often found in industrial, business technology and medical applications.


  • Sewing Machine Needle Driver
  • Speaker Movement
  • High Speed Laser Lens Movement
  • High Speed Diverters (mail processing)

Johnson Electric – Saia Burgess

Johnson Electric is a global leader in motion products, control systems and flexible interconnects. We serve a broad range of industries including automotive, building automation and security, business machines, defense and aerospace, food and beverage, home technologies, HVAC, industrial equipment, medical devices, personal care, power equipment and power tools.

Brand names:    Saia-Burgess  –  Ledex  –  Dormeyer

Rotary DC Solenoids

Rotary solenoids are what we do best. This technology is built specifically for high-speed actuation devices and offers reliable operations.

Johnson Electric is the world leader in Rotary Solenoid technology.  Rotary solenoids are electromechanical devices that convert linear motion to rotary motion by virtue of three ball bearings that travel down inclined raceways. When the coil is energized, the armature assembly is pulled towards the stator and rotated through an arc determined by the coining of the raceways. These extremely high speed actuation devices provide very long life operation for the most challenging applications. With operating life up to fifty million cycles, a wide variety of sizes and custom engineering for life, speed, environmental conditions and torque requirements, the Rotary DC solenoid is ideal for a variety of markets and applications including door locks, vending machines, industrial automation, and medical diagnostic equipment.


  • Food sorter diverter
  • Strapping machine
  • Sorting gates on semiconductor testing machine
  • bulb changers on navigational buoys