ST12001B

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Inrush Current Limiters (ICLs) are a type of electrical component used in many industrial and power electronics applications. They are used to limit the amount of inrush current that flows into equipment when the power is switched on. ST12001B is an Inrush Current Limiter commonly used in industrial and automotive applications.

The main function of an ICL like the ST12001B is to limit the inrush current that flows into a system when the power is switched on. This ensures that the system does not overload and causes any damage to the system or the surrounding equipment. The inrush current is limited by a form of resistance that is switchable when the power is switched on and then switched off when the inrush current has been reduced to an acceptable level.

The ST12001B ICL is typically used to reduce the inrush current on motors, computers, lighting, and other power-hungry equipment. It is also ideal for automotive applications, such as protection against high-current surges upon starting a vehicle or avoiding power-related damage during jump-starts. The ST12001B is a high-current inrush current limiter that can operate as a resistive circuit with a current capacity of up to 70A (140A peak).

The working principle of the ST12001B is based on two thermistor elements. The first thermistor is used to control the inrush current. When power is initially applied to the circuit, this thermistor effectively shorts the circuit and limits the inrush current. As the temperature of the thermistor increases, its resistance starts to rise, and as a result, the inrush current is reduced as well.

Once the current has been reduced to an acceptable level, the second thermistor will start to conduct. This second thermistor will then switch off the first thermistor and permanently maintain the inrush current at a safe level. This enables the device to limit the inrush current while preventing overloading of the system.

The ST12001B is designed for use in high-current applications such as electric motors, electrical transformers, computers, and other high-power industrial equipment. The device is available in three different voltage ratings to suit the requirements of various applications. It can also be used in automotive applications to protect against high-current surges, such as upon starting the vehicle or during jump-starts.

The ST12001B is a reliable and cost-effective solution for limiting inrush current in many applications. It can limit the inrush current while protecting the system from overloads, ensuring that equipment operates safely and efficiently. The device is easy to install and can be used in a variety of applications.

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