B57211P0809M301

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Inrush current limiters (ICLs) – also known as inrush protection, overcurrent protection, line protection, and start-up protection – are designed to protect from excessive currents that can damage sensitive components and circuits. This type of current-limiting circuitry is typically used in applications where excessive inrush current can be caused by the sudden increase in power demands on a power source, such as when powering on high-power, high-density systems, or when turning on components of an electronic system. The B57211P0809M301 is an inrush current limiter specifically designed to limit inrush currents and provide effective circuit protection in a wide range of applications.

The B57211P0809M301 is a single-stage inrush current limiter that uses an active thermal element to limit the peak inrush current. This is a relatively simple solution, as the use of an external diode is not required. The device is available in three different resistance values, depending on the amount of peak current limit required. The standard version provides a 200 A peak current limit, while the higher values provide 400 A and 800 A limits. Other features of the B57211P0809M301 include high-temperature stability, a fast-response time, and a wide operating temperature range.

The most common application for the B57211P0809M301 is in electronic circuits for consumer electronics, communication, automotive, and industrial electronic applications where it is necessary to limit the inrush current. In many of these applications, large surge currents can cause overheating of the components, which can lead to component failure or even fire. By limiting the inrush current, components can be protected from high current stress and the system from intermittent malfunctions. The B57211P0809M301 also features an adjustable thermal trip point, enabling it to be set according to customer specifications.

The working principle of the B57211P0809M301 is based on thermal activation. The resistance of the device is determined by the operating temperature, which is controlled by a thermally-isolated hot spot, located inside the device. The thermally-isolated hot spot will heat up whenever a surge current flows through it. This will cause the resistance of the device to increase, thereby limiting the amount of surge current available. When the peak inrush current has been limited, the device will cool down and the resistance will return to its original value. This type of circuit protection enables effective protection from high inrush current, without the need for an external diode.

The B57211P0809M301 is a cost-effective, space-saving solution for limiting inrush currents in a wide range of applications. It is easy to integrate into existing circuits, as it is a single-stage circuit device. Its higher peak current limit allows it to be used in applications that require higher power dissipation. The adjustable thermal trip point also makes it possible to customize its trip point to meet specific requirements. Thanks to its compact size, fast response time, and wide temperature range, the B57211P0809M301 is a reliable and effective way to limit inrush current in any circuit.

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