B57236S0800M051

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Inrush Current Limiters (ICLs), such as B57236S0800M051, are electronic components which are designed to limit the amount of inrush current or startup current that flows into a system. In simple terms, these components act as a “gateway” for all the current from the power supply to the system.

Application field

Inrush Current Limiters are used in a variety of industrial and consumer applications, including:

• Computers and other electronic devices
• Automotive, aerospace and industrial applications
• Power systems and power systems protection
• Lighting control
• Communications equipment
• Medical equipment
• Power conversion

They are also used in various other industrial devices, such as motor starters, electrical transformers and DC-DC converters.

Working Principle

Inrush Current Limiters work by regulating the maximum inrush current and allowing the current to gradually build up as the system starts up. This process helps prevent damage to sensitive electronic components, such as integrated circuits, from sudden power surges.

To do this, ICLs incorporate a special sensing component, usually a thermistor, which senses the current flowing through the circuit. When the current reaches a specific level, the thermistor’s resistance increases dramatically, effectively limiting the inrush current. This increases gradually, allowing the current to build up slowly and safely.

For more precise control of the inrush current, a resistor can be used in combination with the thermistor. This helps control the current between pre-set levels, limiting any sudden surges of inrush current.

In addition, some ICLs also incorporate additional components such as capacitors and diodes to further reduce the surge current and improve the protection of sensitive components. This helps ensure the system is protected against sudden power surges or current spikes.

Overall, Inrush Current Limiters, such as B57236S0800M051, are an essential component in any high power system. They ensure that the current is regulated and any sudden surges or spikes are limited to prevent damage to sensitive electronic components, ensuring the system operates safely and reliably.

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