SG305

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Inrush Current Limiters (ICL) refers to a type of device which is designed to protect sensitive circuits against potentially damaging inrush currents. It works by limiting the peak current which is drawn during the initial stages of powering up the device, which reduces the risk of overload or system failure. The SG305 is a type of ICL device which is designed for low voltage applications. It is composed of a metal oxide film resistor, a thermal cutoff switch and a thermal fuse.

The thermal cutoff switch in the SG305 is designed to be opened during the initial powering up of the device, which in turn limits the inrush current. This is achieved by effectively introducing a dead time window within which the current is limited. Moreover, the thermal fuse allows for additional protection in the event of an overload, as it will cut off the power to the device before any serious damage is caused.

The SG305 has a current rating of 3 A at 24 VDC, with a peak surge current rating of 45 A. This means that the device can effectively handle large inrush currents, while also being suitable for low voltage applications. In addition, the device has a low thermal resistance, which allows it to be used in high ambient temperatures without causing excessive temperatures in the device.

The SG305 is designed to be used in a wide variety of applications. These applications include desktop computers, industrial/automotive control systems, audio/visual systems, test/measurement systems, and other low voltage, high power density applications. The device is also suitable for both AC and DC applications.

In terms of working principle, the SG305 works by limiting the initial voltage spike which is created when the device is powered up. This is achieved by introducing a delay between the voltage being applied and the current being drawn. During this dead time window, the current is allowed to increase slowly, thus limiting the peak current and preventing the risk of overload. This results in a more reliable power-up process for the device.

Overall, the SG305 is an effective and reliable inrush current limiting device which is suitable for low voltage applications. Its robust construction and low thermal resistance allows it to be used in a wide range of environments, while its peak surge rating ensures that it can handle high inrush currents without compromising system performance. Additionally, the device is designed to protect sensitive circuits against the risk of overload, thus ensuring a safe and reliable power up process.

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