PTC Thermistor

The PTC series is a positive temperature coefficient thermistor, and its resistance value shows a step like increase with the temperature of the thermistor body. The higher the temperature, the greater the resistance value. When its Curie temperature ranges from 40-300 ℃, the section of its R-T characteristic curve where the resistance value sharply increases after entering the transition zone can be used for temperature, liquid level, and flow sensing applications. Based on the temperature sensitive characteristics of PTC thermistors, they are designed for use in overheat protection and temperature sensing applications, including switch mode power supplies, electrical equipment (motors, transformers), and power devices (transistors). The characteristics are small size, fast response time, and easy installation. Commonly used models MZ12A MZ12B、MZ12AV、MZ11B.

1、MZ12A Series is the new generation of components for over current protection. Its safety characteristics passed the testing and meet the requirements of UL1434. It can do protection and recovery automatically and repetitively without contacting spot, noise and spark, MZ12A Series PTc Thermistor is designed specially for over current protection of the Ballast / CFL / Adaptor / Charger / Watt-hour Meter / Multimeter / Telecom / Micromotor etc, as show as the example of application. When the circuit protected is at normal state, current through the PTC thermistor will be lower than its Max. Non-operating Current (IN). At this time Rt is at low-resistance state, and it won ' taffect the normal work of the circuit protected. While abnormal things (such as over current ) happen, the current will be much higher than its Trip Current (IT), and then Rt will change into high-resistance state very quickly. So the circuit protected will be at open state and non-damaged. After the abnormal things disappear and the temperature & the current recover to normal state, Rt will return to low-resistance state automatically and the circuit protected will recover to normal operating state.

2.As temperature control, MZ12B series PTC thermistor apply to control temperature and protect the circuit for motor of fan, transistor etc.

3.PTC(Positive Temperature Coefficient ) Thermistor is used to start the reheating for electronic ballast and

save energy light.

4.MZ11B Series Thermistor / varistor complex is a preheating start component with zero thermal and zero

power dissipation specially designed for high-tech electronic ballast and energy saving light according to the

special inquiry of several international famous manufacturers in the line of light.