RUEF500-1

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PTC Resettable Fuses have become increasingly popular in recent years for their ability to be reset after current trips. In this article we will look at the RUEF500-1 application field and working principle with details of their design, construction and performance.

RUEF500-1 is a PTC Resettable fuse, which is an integral part of any integrated circuits used for industrial applications. It is designed to provide resistance against over current, overload and short circuit protection, as well as enabling device reset for troubleshooting. It is available in different current ratings, and has a case size of 19 mm x 17 mm. This fuses are RoHS and Pb-free compliant.

The basic design and working principle of the RUEF500-1 PTC Resettable fuse is based on a two-terminal series resistor. It requires no additional external components because the series resistor acts as a thermal fuse. In a normal situation, it passes the normal up to 500 mA of current and starts heating up. It then trips at a predetermined temperature and voltage, thereby limiting the current and preventing damage to the circuit. After the over-current situation is over, it will slowly cool down to its initial state (safe temperature range) and reset automatically.

The construction of the RUEF500-1 consists of two main components, an inner set of coils and an outer body. The inner core is a conductive metal element which consists of small coils made up of nickel or copper wires. These small coils act as heating elements to gradually increase temperature during over-current conditions. The outer body is made of polyphenylene sulfide (PPS), which is a non-conductive material. This enables the device to be reset without having to open or disassemble it.

The performance of the RUEF500-1 is excellent, ensuring a highly reliable and durable fuse. It is able to withstand extreme temperatures and high load currents without breaking down. It has a high breaking capacity of 7A for 2 hrs and a low voltage drop of 0.91V at 10mA. In addition, it has excellent surge capability of up to 100V/μs peak and a symmetric response in both directions.

Overall, the RUEF500-1 is suitable for a wide array of industrial applications due to its excellent design, construction and performance. Its ability to reset itself after overcurrent events makes it ideal for use in medical electronics, automotive electronics and harsh environment applications. With its high reliability, it can provide long lasting protection to the devices and circuits it is connected to.

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