RKEF075

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PTC Resettable Fuses: RKEF075 Application Field and Working Principle

PTC resettable fuses are exceptional electrical components that provide protection against current overloading and electrical circuit feedbacks for a variety of applications. Resettable fuses, commonly referred to as Polyfuse, PPTC or PTC (for positive temperature coefficient) are designed to protect electrical circuits from current overloads. When too much current is drawn, the thermal element in the fuse will heat up, expanding the fuse element and causing the connection to be broken.

One of the more widely used resettable fuses in the market today is the RKEF075 series. These fuses feature a radial lead package, making them easy to install during production and provide a simple solution for protection against current overloads. RKEF075 fuses have a wide current range and can handle up to 18A, making them ideal for use in high-power applications such as lighting, home entertainment equipment and digital tools.

The RKEF075 series resettable fuses are designed to be installed on a circuit board. During operation, the fuse element will be heated up to the point where it expands, breaking the connection between the two contacts. This will then cause the current to be reduced to a safe level and the fuse will be reset. The RKEF075 series fuses feature an integrated current sensing mechanism that detects any current overload and immediately shuts off the circuit.

The RKEF075’s built-in protection mechanisms help it to provide stable circuit protection against minute power surges, short circuit issues and current overloads. This resettable fuse offers superior protection compared to standard fuses, while also allowing for quick resetting of the circuit when the overload is removed. The RKEF075 also features an inrush current limiting mechanism which helps reduce the inrush current when the application is first powered on.

The working principle of the RKEF075 fuse is based on the thermal element of the device. When too much current is drawn, the thermal element will heat up, causing it to expand and disconnect the two contacts. This will then reduce the current to a safe level, allowing for it to be reset. The fuse element can then be reset by removing the power supply or by a manual switch.

RKEF075 series fuses are ideal for high-power applications that require reliable, efficient and safe electrical protection. These fuses offer superior circuit protection with an integrated current sensing mechanism and can easily be reset when the current overload has been removed. The RKEF075 is one of the most popular resettable fuses in the market, thanks to its reliability and efficiency.

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