PTCCL09H171HTE

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PTC resettable fuses, also called poly-fuses, are self-regulating current protection devices used in many applications due to their ability to reset after a fault. The resettable fuse used in this application is a model PTCCL09H171HTE, and its capabilities can be best understood by examining its application field and working principle.

Application Field

The PTCCL09H171HTE is a polymeric positive temperature coefficient (PPTC) device designed for overcurrent protection in automotive, consumer, and industrial applications. It is suitable for use in applications where overcurrent protection is required and resetting the protection device after the fault has been cleared is preferable. The device is offered in a variety of package sizes and pass-through configurations, providing the user with a way to custom design the appropriate protection for the application.

The device is resistant to shock and vibration, making it well suited for transportation and other industrial applications. It is designed to protect against overcurrents at up to 200A when the ambient temperature is 25°C. The device also has an impressive 60VAC rating, making it suitable for a variety of high voltage applications. With its high temperature rating, it is also well suited for automotive and consumer applications in which peak temperatures may reach as high as 125°C.

Working Principle

The PTCCL09H171HTE utilizes a PTC thermistor technology for its overcurrent protection. A PTC thermistor is a semiconductor device that has a positive temperature coefficient of resistance. This means that as the temperature of the device increases, so does its resistance. This effect is used by the device to provide overcurrent protection by restricting the current flow once the current reaches a certain level. The typical trip point for the device is between 1 and 20A, making it suitable for a wide range of applications.

Once the current reaches the trip point, the resistance of the device rapidly increases, effectively eliminating the current flow. If the fault is cleared, the resistance of the device will slowly decrease and the device will eventually reset itself. This feature makes the device very attractive for many applications as it can be reset without having to physically replace the protection device.

Conclusion

The PTCCL09H171HTE PTC resettable fuse is a versatile and reliable overcurrent protection device. Its durability, high temperature rating, and ability to reset itself make it well suited for a wide range of applications where overcurrent protection is required. Whether in consumer electronics, automobiles, or industrial applications, the PTCCL09H171HTE offers reliable protection against overcurrents.

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