ICL NTC Inrush Current Limiters/Thermistors Eaton ICL NTC Inrush Current Limiters/Thermistors are high resistance components that reduce resistance during the intentional heat up. The ICL thermistors function as power resistors with high cold resistance and then shift to low hot resistance with the current flow. Applications include household electrical appliances, white goods, switch mode power supplies, DC/DC power converters, lighting, HVAC, motor control/transformer protection, and power converter/inverter systems.