AS35 3R030

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Inrush Current Limiters (ICL) facilitate the prompt and consistent flow of current into a circuit during power-up. The AS35 3R030 is a prime example of such a device, and when teamed with an appropriate component, it creates a powerful solution for applications that require an elastically decreasing current influx during a circuit’s initial state of operation.

Operationally, an ICL is essentially a switch that opens and closes rapidly while monitoring the supply voltage and amperage. When activated, the ICL exerts itself in regulating the circuit’s current flow; Depending on the circuit, this can range from hundreds to several thousands amps. The AS35 3R030 operates by controlling the power supply’s current output in order to prevent the circuit from reaching its maximum Load Current (LCmax) rating. In this it triggers an interrupt to the circuit as soon as the LCmax value is nearing realization, allowing the circuit to recover and the necessary components to cool down and reset.

The AS35 3R030 also features an integrated resistor to lower the surge effect of current during the circuit’s power up. Situated within the resistor is a thermal fuse that, when triggered, initiates a power shutdown should an overheating components be detected. In essence, the thermal fuse and resistor serve the dual purpose of both providing surge protection and help to maintain system temperature. The fuse and resistor also play a part in the self-clearing mechanism of the ICL; should overload or incorrect data be sent to the ICL then it will automatically abort and reset itself, signalling a potential hazard that may need addressing.

In terms of applications, this type of ICL is ideal for use in medium- and high-power switch-mode power supplies (SMPS) such as those used in industrial equipment, home appliances and avionic systems. Thanks to its advanced monitoring capabilities, it is especially well suited for applications that require a high degree of precision in circuit operations and where safety is of paramount importance. In such applications, it provides reliable and consistent protection against a wide range of overcurrent and fault conditions, reducing the risk of component damage or failure. This affords greater confidence to system users, knowing that their equipment is being correctly monitored and fully protected at all times.

To summarize, the AS35 3R030 is an Inrush Current Limiter capable of monitoring and regulating a circuit’s initial current flow to prevent overloads and further component damage. Its ability to respond quickly and accurately to changing conditions, without having to rely on software, makes it very suitable for high-power SMPS and other safety-critical applications. With its thermal fuse and resistive components, it serves as an additional line of protection, one that can be relied on to ensure the consistency and performance of even the most demanding of systems.

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