RUEF135-AP Circuit Protection

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PTC resettable fuses are specialized devices designed to protect against a specific over-current fault situation in electrical circuits. The RUEF135-AP is an example of such a device, and its application field and working principle will be explored further in this article.

When overvoltage or over-current occurs in an electrical circuit, it can damage circuit components or even start a fire if left unchecked. To counter this, PTC resettable fuses have been developed to provide over-current protection in electrical circuits. The RUEF135-AP is an example of such a device, and its application field and working principle are as follows.

The RUEF135-AP is a surface mount resettable fuse designed for use in low voltage (12V or less) and low power applications such as cellular phone chargers, medical devices, consumer electronics and LED lighting. This resettable fuse features a current rating of 135mA and a voltage rating of 30Vdc. When exposed to an over-current condition, the device acts as an open circuit, cutting off the current flow and protecting the circuit from damage.

The working principle of the RUEF135-AP is based on the phenomenon of polymeric positive temperature coefficient (PPTC) materials. When a current passes through a PPTC material, the temperature begins to rise and the material\'s resistance increases. This increase in resistance limits the current flow and helps protect the circuit from damage.

When the overcurrent is removed, the PPTC material cools and its resistance returns to its original level. The device then acts as a closed circuit, allowing current to flow through it once again. This resettable action makes the RUEF135-AP an ideal choice for applications where resetting the device is desirable, such as in consumer electronics.

In addition, the RUEF135-AP is designed to provide over-temperature, over-voltage and reverse-voltage protection. It also has a low self-heating effect when used in an enclosed environment, making it suitable for use in space-constrained applications.

Overall, the RUEF135-AP is an ideal choice for providing over-current protection in low voltage and low power applications. Its PPTC working principle and resettable action make it the perfect device for circuit protection in consumer electronics, medical devices, LED lighting and other similar applications.

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