MF-R025

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PTC Resettable Fuses, also known as polymeric positive temperature coefficient resettable fuses, have become increasingly popular in a range of modern electronics and electrical applications. The MF-R025 is one of the most common types of PTC Resettable Fuses on the market today. It is used widely in a range of applications where low voltage, current protection, or fusing current is required.

MF-R025 is a wide-acting PTC Resettable Fuse designed for use in surface-mount and through-hole military and high-reliability assembly applications. It has a low profile, yet offers reliable overcurrent protection. It also has multiple resettable thresholds, allowing it to handle different levels of over- current loads. As with all PTC Fuses, it automatically resets after the over-current situation has been corrected.

The working principle of the MF-R025 Resettable Fuse is based on the junction of two types of thermoplastic materials, each with different coefficients of thermal expansion. This thermal expansion creates internal mechanical pressure between the two materials. If the current flowing through the fuse exceeds the rated current, the internal mechanical pressure increases, resulting in a safety shut- off. Once the over-current event has been corrected, the thermal expansion automatically resets the PTC Resettable Fuse.

The MF-R025 is suitable for use in a range of applications that require reliable overcurrent protection. This includes control panels, lighting, consumer electronics, and medical equipment. In digital circuits, it is suitable for use as a transition power supply switch, power-on reset circuit protector, and reset protection device. In automotive applications, it is often used as an over-current protection device for battery-powered systems, fuel pumps, and other systems that require reliable protection against over-current events.

In addition to providing reliable over-current protection, the MF-R025 Resettable Fuse also has a high rate of cycling, making it suitable for use in applications where frequent interruptions are likely. The fuse also has an extremely low internal resistance, allowing for high current interruptions without sacrificing performance. In addition, the small size and light weight of the MF-R025 make it ideal for use in mobile applications.

Overall, the MF-R025 Resettable Fuse is a reliable and cost-effective solution for a range of applications that require reliable over-current protection. It offers many advantages over traditional fuses, such as multi-resettable thresholds, high cycling rates, low internal resistance, and small form factor. As such, it is an excellent choice for use in a range of applications, from digital circuits to lighting and automotive systems.

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