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Composite PTC module for overvoltage and overcurrent protection
Nanjing Huaju Electronics grandly launches the composite PTC thermistor WMZ13A series composite PTC thermistor with dual protection functions of overvoltage and overcurrent protection. Huaju Electronics creatively combines the PTC thermistor with overcurrent protection function and the overvoltage protection function. The protective varistor is packaged into a device so that they are coupled to each other to have both overcurrent protection and overvoltage protection. These products have been widely used in smart instruments, high-performance small switching power supplies, and LED lighting, producing good economic and social benefits. 1. Application scope: WMZ13A series PTC thermistor is a protective element that automatically protects and recovers against abnormal temperatures and abnormal currents. It replaces traditional fuses and can be widely used for overcurrent in motors, transformers, electronic circuits, etc. Overload protection. The thermistor reduces the residual current value by limiting consumption in the entire line through sudden changes in its resistance value. In a traditional fuse line, it cannot recover by itself after it is blown, while a PTC thermistor can resume its protective function after the fault is removed. .
- Commodity name： Composite PTC module for overvoltage and overcurrent protection
- 产品描述
- 产品规格及参数
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Introduction to composite PTC module for overvoltage and overcurrent protection:
Nanjing Huaju Electronics grandly launches the composite PTC thermistor WMZ13A series composite PTC thermistor with dual protection functions of overvoltage and overcurrent protection. Huaju Electronics creatively combines the PTC thermistor with overcurrent protection function and the overvoltage protection function. The protective varistor is packaged into a device so that they are coupled to each other to have both overcurrent protection and overvoltage protection. These products have been widely used in smart instruments, high-performance small switching power supplies, and LED lighting, producing good economic and social benefits. 1. Application scope: WMZ13A series PTC thermistor is a protective element that automatically protects and recovers against abnormal temperatures and abnormal currents. It replaces traditional fuses and can be widely used for overcurrent in motors, transformers, electronic circuits, etc. Overload protection. The thermistor reduces the residual current value by limiting consumption in the entire line through sudden changes in its resistance value. In a traditional fuse line, it cannot recover by itself after it is blown, while a PTC thermistor can resume its protective function after the fault is removed. .
To choose a PTC thermistor as an overload protection component, first confirm the maximum normal operating current of the line (that is, the non-operating current of the PTC thermistor) and the maximum ambient temperature of the PTC thermistor installation location (during normal operation), and secondly, the protection Current (that is, the operating current of the PTC thermistor), maximum operating voltage, rated zero power resistance, and factors such as the overall size of the component should also be considered. As shown in the figure below: the relationship between the operating environment temperature, non-operating current and operating current.
2. Application scope: Mainly used for overcurrent, overload and short-circuit protection of smart meters, transformers, motors, switching power supplies, chargers, adapters, instruments, control panels, household appliances, air conditioners, microwave ovens, etc.
3. Application principle:
Connect the overcurrent protection and overvoltage protection PTC thermistor in series in the power circuit. When the circuit is in a normal state, the current flowing through the PTC is less than the rated current. The PTC is in normal state and has a very small resistance, which will not affect electronic equipment and other devices. Protect the normal operation of the circuit. When the circuit current greatly exceeds the rated current, the PTC suddenly heats up and the resistance suddenly increases to a high resistance state, thus limiting or blocking the current and protecting the circuit from damage. After the current returns to normal, the PTC also automatically returns to the low resistance state, and the circuit returns to normal operation. Similarly, when the external voltage fluctuates, the varistor plays an overvoltage protection function. The increase in current flowing through the PTC thermistor can also cause the PTC to suddenly heat up, and the resistance value suddenly increases to a high resistance state, thereby limiting or blocking the current and protecting the voltage. The PTC thermistor with overcurrent and overvoltage protection has a wide range of applications in instrumentation.
4. Model naming
Key words:
Composite PTC module for overvoltage and overcurrent protection
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