SG260

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Inrush current limiters (ICLs) are an important component in many electrical applications. In terms of protection, they are used as a fuse-like device that will trip and shut off the circuit if the voltage or current becomes too high. Additionally, they help to maintain proper operation of equipment and stability in the system.

SG260 is an inrush current limiter from KEMET, an international supplier specializing in electrical components. It is designed to protect circuit boards and other components from the damaging effects of large inrush currents. The SG260 limiter has the ability to quickly limit and reduce inrush currents in a matter of microseconds to protect circuits from damage, while simultaneously providing circuit integrity.

This ICL has a short-time overload current rating of 25A (25 Amperes) with a maximum operating voltage of 250V. The maximum peak pulse current is rated to 40A, while the maximum let-through inrush current is rated to 42A. The SG260 also has an internal temperature coefficient of 0.3mOhm/°C, making it suitable for temperature-sensitive applications.

This ICL works based on the principle of electro-thermal shunting. This means that the limiter works by shunting current away from the load using a resistor, which in turn has a thermal property that is activated when it absorbs energy.

In a typical application, the SG260 limiter is installed in series between the line and load. When the load is switched on, it creates a large demand for current that can, in some cases, exceed the load\'s normal operating current. This increase in current then causes the resistor in the limiter to heat up, and it will then reduce or limit the current to a predetermined level. This limiting action is rapid, taking place in only a few microseconds.

The SG260 limiter is especially well-suited for voltage sensitive applications such as telecom, data storage, and medical imaging systems. It is also commonly used in applications with switched-mode power supplies, where fast switching transients may cause a large inrush current. The limiter also provides excellent protection against AC line voltage transients such as lightning strikes, voltage spikes, and common mode transients.

In summary, the SG260 inrush current limiter from KEMET is designed to protect circuits and components from the damaging effects of large inrush currents. Its short-time overload current rating of 25A and maximum operating voltage of 250V make it suitable for a wide range of applications. It works on the principle of electro-thermal shunting, which quickly limits and reduces inrush currents in a matter of microseconds. The limiter is primarily used in voltage-sensitive applications such as telecom, data storage, medical imaging systems, and switched-mode power supplies.

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