The PTCLL05P211TTE from Vishay is a Positive Temperature Coefficient Thermistor that is ideal for fluorescent lighting and lighting ballast applications. It has a voltage rating of up to 700 V and a current rating of less than 300 mA. This thermistor has a resistance of 300 ohms. It offers reliable lamp starting operations due to well-defined inrush-current generated time delay. This RoHS-compliant thermistor has a long lifespan of more than 20000 starts for a 20 W CFL lamp. It is available in a through-hole package that measures 12.5 x 5.4 mm.