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Medium Voltage

Medium Voltage Thyristors
Phase control medium voltage thyristors optimize direct current switching in electrical systems carrying voltages up to 6.5 kV and currents below 4 kA. These specially designed solid state switches limit conduction losses as voltage increases. Medium voltage thyristors also ensure turnoff times do not increase in line with increases in voltage. By doing that, the thyristors lower risks for commutation failures. Littelfuse medium voltage thyristors perform best when used in series. Applications for the solid state switches include dc–dc converters, DC motor drives, and volt–amp (VAR) compensators.
  • Rated at between 3.2 kA and 6.5 kA
  • Available with silicon capsule diameters from 35 mm to 96 mm
  • Optimized for series operation in electrical systems with voltage ratings up to 6.5 kV and current ratings less than 4 kA
  • Maximum power handling capacity achieved at line frequencies below 400 Hz
  • Patented distributed gate architecture ensures excellent switching performance over wide ranges of voltages and currents
  • Engineered to achieve optimal balance between conduction losses, turnoff time, and power-handling capacity
  • Can be used in parallel
  • Predictable fast turnoff prevents commutation failure

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