MF72-006D13

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Inrush current limitation is a crucial technology to protect circuit and the power system from overloading and potential damages occurred during short circuit or power on. It is also an important part for circuit and device design to ensure the safety and reliability of the system. The inrush current limiter (ICL) is a widespread device in order to limit inrush current in circuits and systems. This article introduces the MF72-006D13, which is a kind of ICL and presents its application field as well as working principle.

Application Field of MF72-006D13

MF72-006D13 is a kind of common inrush current limiter designed for wide working temperature range and superior inrush current limiting ability. It is mainly used in AC/DC power supply, capacitor charging, UPS, motor starter, AC drive, electronic ballasts, welding machine, induction cooking and so forth. Besides, it could also be used in other fields where current limiting is needed.

Working Principle of MF72-006D13

The working principle of MF72-006D13 is quite simple. When a higher voltage than the rated voltage is applied, the device will start working. During this process, it will generate heat because of the resistance it functions and thus causes temperature rise. The temperature then reaches the trigger temperature and the current limiting resistance element will fire up to limit the current. Due to the low resistance, the limited current is much lower than the normal one and thus protecting circuit and system from overloading.

When the current is limited, the heat generated will instantaneously increase. After a period of time, the temperature will reach thermal equilibrium and the current is kept at a low level. The limiting current will now depend on the thermal equilibrium temperature, which depends on the external environment, its thermal characteristics and its resistance value. In other words, the current helps the device to maintain stable temperature in order to limit the current.

To sum up, the MF72-006D13 is an inrush current limiter used for various device design, AC/DC power supply and driven system, etc. Its working principle is through temperature rise and then turn on the low impedance resistor element to limit the current.

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