MF72-003D25

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Inrush current limiters (ICLs) are current- and voltage-limiting devices used to prevent spikes of current due to a sudden inrush of power. These devices can also reduce power loss from inrush conditions, as well as provide benefits during power outages or during start-up, shutdown, or current re-configuration events. The MF72-003D25 is an example of an ICL, and its applications and working principle is outlined below.

The MF72-003D25 is a thyristor ICL with specifications and features including: maximum current rating of 25A, maximum voltage of 4200V, surge current of 2.5A for 10 microseconds, AC and DC types, and AC/DC type with parameters of 20A and 1400V. This ICL is suitable for applications such as: mini-inverters, high current starting, switching power supply, general industry, automation, UPS, and HVAC systems. It is even an ideal choice for applications that require higher current ratings. The MF72-003D25 has been designed to limit the surge current by the combination of the two thyristors.

The working principle of the MF72-003D25 involves two series thyristors that are used in tandem to limit the surge current. When the ICL is connected to a high-power circuit, the double-threshold system triggers the thyristors to rapidly limit the surge current. When the surge current has stabilized, the two thyristors turn on and the digital control unit adjusts the output current. The thyristor based ICL from CYMOMETER has two unique features that ensure that the output current is limited to a safe level. The first feature is an active controlled feedback loop, which allows the device to quickly reach the desired output current by adapting to changing input and output conditions. The second feature is a hysteresis circuit, which prevents the ICL from excessively oscillating due to changes in the input conditions. This ensures a steady and reliable output current.

The MF72-003D25 is a special thyristor based ICL that can offer superior surge protection and additional protection against over-current, over-temperature, over-voltage, as well as ESD. The embedded digital control unit allows for quick and accurate current indication and regulation. The device is efficient and reliable, making it an ideal choice for high-power applications. The MF72-003D25 is also highly cost effective, making it an attractive option when compared with other inrush current limiters.

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