SG39

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Inrush Current Limiters (ICL) are designed to protect electrical components from high current overloads that occur during system powering on or off, as well as to protect circuits from inrush current. SG39 is one of the most common inrush current limiters that is used in many applications. The SG39\'s work by limiting current and preventing overloads.

The SG39 works by limiting the current through a process called voltage drop. This is accomplished by inserting resistors between a power supply\'s high voltage bus and the load being powered. When the power is first applied, the resistors cause many drops in voltage, and the resulting current is limited.

The SG39 has several features that make it an ideal choice for preventing unexpected power surges and protecting circuits. The SG39 has a wide operating temperature range, making it suitable for use in most applications. It also has a low impedance, enabling it to limit inrush current to levels that are safe for components. In addition, the SG39 has a fast response time, allowing it to quickly limit current when needed.

The SG39 has several main components. The first is a pulse transformer, which is used to isolate the power supply from the load. It also connects the resistor network to the power supply. The second component is the resistor network, which consists of several resistors and diodes arranged in a specific pattern. The resistors create a steady voltage drop, and the diodes allow current to flow only when the voltage drops below a certain level.

The third component is the sense voltage regulator, which monitors the power supply voltage. If the voltage exceeds the maximum allowable limit, the sense voltage regulator shuts off the power supply. The fourth component is the control circuit, which is responsible for switching off the control relay when it detects an overcurrent. The fifth component is the bypass switch, which disconnects the resistor network when the power supply is disconnected. This allows the system to be powered back up without having to wait for the resistors and diodes to reset.

Overall, the SG39 is an effective inrush current limiter with many different applications. It is designed to provide protection from power surges, and its fast response time, wide temperature range, and low impedance make it suitable for most applications. With the addition of the sense voltage regulator, control relay, and bypass switch, the SG39 is able to quickly and efficiently limit inrush current.

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