Ametherm MCL20 500100-A Thermistor

Ametherm MCL20 500100-A Thermistor features an industry-high 680V voltage rating. This component is ideal for inrush current limiting and overcurrent protection in applications such as welding equipment and plasma cutters with high voltages from 480V to 930V. The MCL20 500100-A handles a maximum inrush current of 20A at maximum peak voltage. It offers 50Ω resistance at 25°C with a tolerance of 20%/-50%. Ametherm MCL20 500100-A Thermistor provides engineers with a compact alternative to combining a power resistor, relay, and timer on one circuit.


  • High 680V voltage rating
  • 20A max. inrush current at max. peak voltage
  • 50Ω resistance at 25°C with a tolerance of 20%/-50%
  • 55mW/°C dissipation constant (DC)
  • 5.45J/°C heat capacity
  • 62s thermal time constant (TC)
  • Radial-leaded for easy PCB mounting
  • 19mm diameter, 9mm max. profile, and 7.8mm lead spacing


  • Welding equipment
  • Plasma cutters
Veröffentlichungsdatum: 2015-09-18 | Aktualisiert: 2022-03-11