Capacitors in the DC circuits located between the input or output stages are called DC-link capacitors.

These capacitors:​​​​​​​​​​​​​​

  •  filter the DC voltage 
  • store energy to provide instantaneous current to downstream circuits and in some application fail-safe power loss operations
  • DC link capacitors must be able to withstand high power, high ripple currents, and a large amount of charge/discharge cycles.
  • DC link capacitors are used in windmills, solar farms, and other renewable energy source circuits; they must operate reliably and safely in harsh environments.
  • Inverters
    • Green Energy: Solar and Wind
    • Automotive: Traction (C4E)
  • On-Board Battery Charger
  • Regenerative drives
  • Motor Drives
  • Welding Machines
  • SMPS

Metalized Polypropylene Film (MKP)

DC-Link capacitors use thin polypropylene film as their dielectric and are found in power converter circuits for DC filtering, and energy storage. These capacitors are stable over temperature, frequency, and time. They have low DF, excellent self-healing capability, and long operational lifetimes.

  • High Capacitance Density
  • Extended life at >100,000 hours at VN at rated hot spot temperature
  • High Reliability
  • High ripple Current
  • Low losses