SL15 7R005

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Inrush current limiters (ICL) are devices that limit the amount of current that can first enter a circuit when connected to a power source. The SL15 7R005 is one such ICL capable of limiting inrush current and is used in various applications. This article will cover the technical specifications of the device and its working principle.

Technical Specifications

The SL15 7R005 ICL is a two-terminal NTC thermistor with a resistance of 7.5 Ohms and a maximum current rating of 2 A. It is mainly used in computer supplies as a protection circuit against overcurrent and also to provide an initial time delay to circuit protection elements, thereby preventing them from activating too soon. The device has good thermal stability, with a thermal coefficient of resistance of 0.7 ohm/K and a power dissipation of 1.5-2 W.

Working Principle

In order to understand how an ICL works, it is important to first understand the concept of inrush current. Inrush current is the initial surge of current that flows through a circuit when the circuit is first connected to a power supply. Inrush current is usually much higher than the steady-state current and can cause damage if it exceeds the circuit\'s designed value. The SL15 7R005 ICL works by limiting the inrush current to safe levels.

When the device is connected to a power source, it connects in series with the circuit\'s power input. When the circuit is first connected, a temporary resistance is formed by the ICL, which limits the current that can enter the circuit. The resistance provided by the ICL dissipates the excess energy in the form of heat, thus limiting the amount of inrush current that can flow through the circuit. Depending on the circuit\'s design and the size of the inrush current, the ICL\'s resistance may vary in order to provide the required protection level.

The SL15 7R005 is, thus, an efficient device capable of limiting inrush current in circuits. With its steady resistance, it ensures that the circuit is protected against damage due to high inrush current. This device is used in a variety of applications, from computer supplies to lighting applications, due to its reliable protection capability.

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