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PTC Resettable Fuses

PTC resettable fuses are a special class of electrical fuses specifically designed to protect against electrical overload and provide circuit protection. They use a Polymeric Positive Temperature Coefficient (PPTC) material, which provides excellent performance and provides protection against surges, shorts, and other electrical hazards. The PTC fuse has many advantages over other fuses, including:

• High accuracy and reliability
• Low current requirements for operation
• Low cost compared with other fuse types
• Ease of installation and usage

PTC resettable fuses are used in a wide variety of applications, ranging from consumer electronics and telecommunications equipment to industrial and automotive applications. They are suitable for use in high-temperature and low-voltage applications such as circuit boards, power circuits, chargers, switches, and other electronics.

PFRT.011.250.U Application Field and Working Principle

The PFRT.011.250.U is a PTC resettable fuse designed for general-purpose use in common electronics and telecommunications equipment. It is rated for 250 VAC, 1.1A at full load current, with a dimension of 2.7mm x 1.3mm. The fuse is constructed of a non-magnetic, high-temperature polymeric material, which provides a wide range of temperature and current ratings.

The PFRT.011.250.U fuse uses a Positive Temperature Coefficient (PTC) resistive element that is designed to prevent electrical overloads by providing an over-current cut-off when the current exceeds a threshold level. When the current exceeds the threshold level, the internal pull-back mechanism trips the fuse and shuts off the circuit. The device can then be reset by turning the circuit off or pressing the reset button, allowing normal operation to resume.

The PFRT.011.250.U PTC fuse has two main benefits: improved equipment safety and improved accuracy. The PTC fuse has a high degree of accuracy, as the pull-back mechanism maintains a precise current threshold. This ensures that the device will always be providing effective circuit protection. Additionally, the PTC fuse has a thermal component, which means that it can respond quickly to rapid temperature changes or excessive loads, providing improved safety for the devices it protects.

Conclusion

The PFRT.011.250.U PTC resettable fuse is an excellent choice for general-purpose use in various types of electronics and telecommunications equipment. It is easy to install and operate, provides accurate and reliable protection against electrical overloads, and has a wide range of temperature and current ratings. Its thermal properties ensure that it can respond quickly to temperature changes to protect the equipment it is responsible for.

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