B57236S0259M051

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Inrush Current Limiters (ICL) are devices used to control and limit high inrush and surge currents flowing into electrical systems. Protecting sensitive electrical components from harmful effects of high inrush current caused by start-up or other sudden changes in power supply, Inrush Current Limiters (ICL) are important components in the overall power protection chain. As a specific type of Inrush Current Limiter (ICL), the Type B57236S0259M051 is a thermally activated device that allows rapid start-up of capacitive, inductive, or resistive loads in 5V systems.

Application Field

The Type B57236S0259M051 Inrush Current Limiter was designed with 5V systems in mind and has a maximum current rating of 8A and a maximum power rating of 40W. Typical applications include high inrush-current controlling in home appliances, consumer electronics, automotive accessories, industrial machinery, and telecommunications equipment. It is well suited for situations that demand high inrush capability while limiting power dissipation, such as when a bypass is required. Since Type B57236S0259M051 Inrush Current Limiters do not require a bypass after start-up, they are also a great choice for applications with limited space.

Working Principle

The working principle of the Type B57236S0259M051 Inrush Current Limiter is based on a PTC thermistor (Positive Temperature Coefficient). When the PTC thermistor is cold, its resistance is relatively low. As or when current passes through the thermistor, it begins to heat up, and its resistance increases significantly. The restriction of the thermistor limits total current from the power supply. This prevents high inrush current from entering the system, protecting it from catastrophic damage.

At the same time, the power dissipated by the thermistor is dependent on the amount of current it is carrying. As the thermal temperature of the thermistor increases, its resistance also increases, causing current flow to be limited, and resulting in decreased power loss downstream. If the thermal temperature of the thermistor reaches its nominal temperature, power dissipation is further reduced to a very low level by using additional external resistance.

Features and Benefits

Type B57236S0259M051 provide a number of features and benefits. Firstly, the high inrush current providing capability ensures fast start-up of capacitive, inductive, or resistive loads in 5V systems. Secondly, its robust construction, comprising of a PTC thermistor and specially designed flux shield, ensures high reliability that is more than capable of handling high voltage and temperature when using a 5V power system. Thirdly, its relatively low thermal coefficient allows extremely low power dissipation at its nominal temperature. Finally, the Type B57236S0259M051 Inrush Current Limiter is cost effective, helping to reduce overall system cost.

Conclusion

TheType B57236S0259M051 Inrush Current Limiter is a reliable and cost-effective solution for controlling high inrush currents and surge currents in 5V systems. Its robust construction and low thermal coefficient ensures efficiency and protection from a wide range of applications. As a thermally activated device, the Type B57236S0259M051 Inrush Current Limiter can be used in start-up or sudden changes in power supply situations, and is a great choice for applications with limited space.

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