MF72 120D9 / NTC 120D-9 Inrush Current Limiter, Power Thermistor 120 ohm 0.8 Amp 10.5mm disk. MF72 120D9. NTC 120D-9 Circuit Protection Thermistor, Inrush Current Limiter. Th is Power NTC Thermistor provide inrush current suppression for sensitive electronics.