Low voltage, low resistance PTC thermistor is a circuit protector. Under normal conditions, its structure is very small, but under abnormal conditions such as motor lockout or short circuit, the resistance will increase sharply to suppress the occurrence of overcurrent. This product is suitable for the protection of automobile low-voltage circuits and motors.

　　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 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 the electronic ballast (energy saving). Normal operation of protected circuits such as lamps, transformers, and multimeters. When the circuit current greatly exceeds the rated current, the PTC suddenly heats up and the resistance suddenly increases to a high resistance state, thereby 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.

　　3. Model name, appearance structure and dimensions:

　　product description

　　The PTC thermistor for overcurrent protection is a protective element that automatically protects and recovers against abnormal temperatures and abnormal currents. It is commonly known as "resettable fuse" and "ten thousand times fuse". It replaces the traditional fuse and can be widely used for overcurrent and overheating protection of motors, transformers, switching power supplies, electronic circuits, etc. The PTC thermistor for overcurrent protection limits the consumption in the entire circuit through its sudden change in resistance to reduce the residual current value. . Traditional fuses cannot recover by themselves after the line is blown, while PTC thermistors for overcurrent protection can return to the pre-protection state after the fault is removed, and can realize their overcurrent and overheating protection functions when a fault occurs again.

　　1. Application scope:

　　Overcurrent protection PTC thermistor is mainly used for overcurrent and overheating protection of [transformer (adapter)/primary coil/charger/digital multimeter/smart electricity meter/micromotor/transistor], etc., and is directly connected in series in the load circuit. When an abnormal condition occurs on the line, it can automatically limit the overcurrent or block the current. When the fault is eliminated, it will return to its original state. It is commonly known as the "10,000-time fuse".

　　2. Features:

　　·Contactless circuit and component protection·Automatic overcurrent limitation

　　·Automatic recovery after troubleshooting ·No noise or sparks during operation

　　·Reliable and easy to use

　　3. Application principle:

　　Connect the overcurrent 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 the electronic ballast (energy saving). Normal operation of protected circuits such as lamps, transformers, and multimeters. When the circuit current greatly exceeds the rated current, the PTC suddenly heats up and the resistance suddenly increases to a high resistance state, thereby 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.

　　Overcurrent protection PTC thermistors are used in overcurrent protection applications such as electronic ballasts (energy-saving lamps, transformers, multimeters). Nanjing Huaju has launched various models and series of PTCs by virtue of its advantages in scientific research and technology. Thermistor, can replace Murata, EPCOS PTC thermostor