PFRA.090.2

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PTC Resettable Fuses are a type of fuse designed to protect electronic circuits from over-current damage or electric overload. They employ a polymer material and a positive temperature coefficient (PTC) that triggers the fuse at a specific threshold and automatically provides circuit protection. PFRA.090.2 is one such PTC Resettable Fuse, designed to provide superior protection in harsh environments. This article will discuss the application field and working principle of the PFRA.090.2.

The PFRA.090.2 is designed to protect circuits in high vibration environments and can be used in automotive, industrial, and other applications. It is suitable for electronic controls, circuit boards, drive motors, pumps, and other systems. This PTC Resettable Fuse has an operating temperature range from -55°C to 125°C, and is rated for up to 8A of current. It is designed to provide reliable circuit protection and has excellent resistance to vibration, shock, and heat.

The working principle of the PFRA.090.2 is based on the use of PTC behavior. When a sufficient current flows through the fuse, either due to a short circuit, over-current, or over-voltage condition, the temperature of the PTC element rapidly rises. As the temperature increases, the resistance of the PTC element increases significantly, limiting the current flow. This limits the amount of energy the circuit can absorb, preventing the circuit from damage and providing circuit protection.

If the fault is removed and the circuit can cool, the PTC element returns to its normal state and the circuit can be reset. This enables the fuse to be reused without the need for a manual reset switch. The circuit can also be reset remotely in systems where a manual reset is impractical, such as in automotive applications.

The PFRA.090.2 is designed to provide reliable circuit protection in harsh environments and is suitable for a wide range of applications. It utilises a PTC element that is triggered by a threshold current, limiting energy absorption and providing circuit protection. When the fault is removed, the circuit can cool and the element resets itself, allowing the circuit to be reused without the need for a reset switch.

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