LVRL125S

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PTC Resettable Fuses are an essential component of electrical circuit protection, and LVRL125S has been used in a wide variety of industries to protect against overloads, shorts, and grounded circuits. To explain its application field and working principle, this paper will first look at what resettable fuses are, their various benefits, and why the LVRL125S is the go-to choice for many engineers. Afterwards, the paper will go into detail about the working principle of the LVRL125S, including its electrical requirements and operating temperature range.

Resettable Fuses, also known as Polyfuses, are self-resetting thermal-type fuses. This means that when a current surge interrupts the flow of electricity, the fuse acts quickly to cut it off. However, instead of requiring a manual reset, the fuse will reset itself after the overload has subsided. This provides an additional layer of protection, while also eliminating the need for a second fuse. This way, the circuit board does not need to be taken apart for reset and maintenance.

The advantages of using a Polyfuse include being cost effective, environmentally friendly, and space saving. Furthermore, they are more reliable and flexible than traditional fuses, as they are able to handle a wide range of temperatures and currents. They are also easier to test and replace as needs arise. LVRL125S stands out amongst other resettable fuses, due to its low profile and its ability to handle up to 125V and 20A. It can easily fit even the most space limiting applications, and is widely used in consumer electronics, computers, appliances, automotive applications, and more.

Moving onto the working principle of the LVRL125S, when the current goes above its rated value, polymeric material inside the device starts to heat up. This change in temperature gradually decreases the resistance of the polymeric material until it reaches a maximum level, at which the current is cut off. This maximum temperature is predetermined to ensure the protection of the circuit. After the current has been cut off, temperatures start to cool gradually, thus decreasing the resistance of the polymeric material. As the resistance decreases, the current is allowed to flow again, and the fuse resets itself.

In order to ensure that the fuse works as intended, the LVRL125S has certain electrical requirements, such as a minimum operating temperature of -40°C and a maximum operating temperature of 125°C. The fuse also requires a continuous operating voltage of up to 125V, and a maximum current of 20A.

To summarise, LVRL125S is a popular resettable fuse used for circuit protection. It has a low profile, which makes it suitable for space limited applications, and can handle currents up to 125V and 20A. Furthermore, it is cost effective and environmentally friendly. The fuse operates by heating up a polymeric material when the current exceeds the setvalue, thus cutting off the current. After the overload has subsided, the polymeric material cools, allowing the current to flow again and resetting the fuse. The fuse requires an operating temperature between -40°C and 125°C, and a continuous operating voltage of up to 125V.

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