307C Lighting Thermistors are electrode preheat thermistors for use in compact fluorescent lamps (CFL) and electronic ballasts developed by Vishay Cera-Mite.
This datasheet describes the Vishay 307C series of lighting thermistors designed for use in compact fluorescent lamps (CFL) and electronic ballasts. These PTC (Positive Temperature Coefficient) resistors function as electrode preheat devices to extend lamp life and ensure quiet, flicker-free operation. The components are developed in cooperation with leading ballast designers and are available in both standard and custom configurations.
| Application | Compact fluorescent lamps (CFL) and electronic ballasts |
|---|---|
| Function | Current limiting, time-delayed start-up |
| Operation | Quiet, flicker-free |
| Resistance Tolerance | ± 25% at 25°C |
| Switch Time | Approximately 1 second at 25°C |
They are used as electrode preheat thermistors for compact fluorescent lamps and electronic ballasts.
By providing current limiting and time-delayed start-up functions.
The time required for the thermistor to switch from a low to a high resistance state.