SPMZA series PTC thermistors are used in various types of fluorescent lamps, electronic ballasts and electronic energy-saving lamps as preheating-starting components. Preheating of the electrodes lengthens the life of the lamps and the number of switching cycles significantly. SAMPOO has been working at PTCR'S research, development and manufacturing for ten years. With rich experience, our company offers PTC thermistors for time delay and switching with high quality and reasonable price. Many lighting producers, including some famous international companies are our customers.
OPERATING PRINCIPLE AND APPREARANCE
See Fig.1: Immediately after power is switched on, the PTCR is cold and it's resistance is far lower than C2's. The current through C1 and Rt forms a return circuit to preheat the filament. About 0.4-2s later, Rt's joule heat temperature exceeds Curie point Tc and the PTCR will switch. Its resistance is far higher than C2's. The current passes through C1 and C2 to form a return circuit, which causes LC resonance and produces high voltage to light the fluorescent tube.
Part Number Code
SPEC.TABLE
Notes:
1. 75℃, 85℃and 105℃series PTCR are mostly used.
2. The data is only for reference, you can forward your detailed requirements if possible.
3. We have obtained the SGS test report about the content of Lead、Cadmium、Mercury、 Hexavalent Chromium、PBBs、PBDEs in the SPMZA series PTCR.
