MF72-008D9

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Inrush current limiters (ICLs) act as protective devices for power supplies, by limiting the amount of current drawn in during an initial power-up. The MF72-008D9 is a prime example of a state-of-the-art ICL – a device that has been designed to provide considerable protection against inrush currents in applications where the power input can potentially have an initial current above 10A. Utilizing a special design feature known as snap-action, the MF72-008D9 offers a high degree of electrical insulation, as well as additional temperature-resistant properties. All of this makes it an ideal choice for use in highly sensitive electronics applications.

The MF72-008D9 is most famously found used in power supplies based in high-end electronics. Inside such systems, the device functions as an inrush current limiter which works by restricting the current drawn in when the device is turned on. This helps to maintain optimal levels of electrical performance, but also to keep the device safe from experiencing damage due to high current flows. As a result, typical applications for the MF72-008D9 will include servers, data storage systems, industrial machinery and any other place where a high degree of protection against high current inrush is required.

The theoretical working principle for such a device is relatively simple. It works by leveraging the physical properties of a NTC thermistor, which is incorporated into the circuit. During the initial startup of a power supply, the device will draw a relatively high current in order to obtain the required output voltage. The NTC thermistor heats up when an electrical current flows through it and then contracts, resisting the further amount of current that can flow through it. In practice, the resistor is designed to have a special “snap action” feature which triggers the resistance to kick-in whenever the current crosses beyond what is pre-determined to be the recommended level for an initial current surge.

At that point, the resistance that is generated by the NTC thermistor will lead to a reducton in the amount of current supplied, thus providing a fail-safe solution for high-current inrush situations. Depending on the specifics of the resistor, the current flowing through the circuit could be reduced by up to 95%. This ensures that the surge of current needed to begin the power up process is kept well below the tolerance level of whatever electronic component is being utilized, with the MF72-008D9 being a good example of this type of device.

In terms of technical details, the MF72-008D9 is a self-contained, low profile inrush current limiter device, capable of handling currents up to 10A. It is a type of negative temperature coefficient (NTC) thermistor, with an operating temperature range of -40C to +85C. The device is powered using a 5.5V DC power source, and is rated for a maximum working voltage of 25V DC. In terms of mechanical construction, the device is just 23 mm long, 12 mm wide and 11 mm in depth, so it is extremely compact and easy to install in places where space is at a premium.

The performance of the MF72-008D9 has been measured on a variety of different parameters, such as resistance, inductance, capacitance and temperature coefficient. Results have shown that the device is capable of achieving a maximum impedance of 0.14Ohm, a minimal inductance of 0.09mH, and a temperature coefficient of -30C. It is also relatively and can respond to changing currents in just .75 milliseconds. The resistance of the device also increases quite significantly with the increase in temperature, which is also reflected in the overall temperature coefficient.

Overall, the MF72-008D inrush current limiter is an ideal choice for a wide range of applications that require a level of protection against high electrical current. Given its small size, high-level of performance, and reliable (snap action) design, it is a preferred choice for many of the most sensitive electrical systems, such as power supplies in servers, data storage systems, and industrial machinery. Ultimately, the MF72-008D is a reliable and effective solution to high inrush current and provides the best protection available for such applications.

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