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The Asterion® TW combines powerful ultrasonics with precise servo positioning to deliver fast and robust welding of thick copper terminals. Together with the Asterion® and Asterion® PW, it forms a complete production solution for power module interconnects.



Powered by 3,500 W of ultrasonic energy and 1,500 N of force, Asterion® TW ensures robust welding of Cu terminals up to 2 mm thick.


The ±180º weld head precisely orients each weld to minimize stress on terminals and surrounding components.


With a high-resolution linear motor positioning system, the welder achieves exceptional ±40 µm weld placement repeatability at 3 σ precision.

High Performance

Utilize latest technology

The Asterion® TW features the latest ultrasonic welding technology with an advanced precision servo positioning system.


  • Provides a robust and stable welding process (terminals to substrates) without heat or hazardous byproducts.

  • 3500 W power and 1500 N force for precise welding of up to 2 mm copper terminals.

Maximum Flexibility

Large motion range

  • 150 mm z-axis stroke easily handles significant height variations in power modules.
  • ±180° theta axis for optimal ultrasonic motion orientation to minimize component stress.
Adaptive Solutions

Optional material handling system

  • Inline and magazine configurations are available to meet diverse production requirements.

  • K&S-designed clamp tooling ensures an optimal and efficient welding process.

  • A robust cleaning station with an ionizer effectively removes particles from the module.

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