RUEF300

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PTC resettable fuses are electrical components used to protect electronic applications from damaging overcurrents. There are three main types of PTC resettable fuses: polymeric positive temperature coefficient (PPTC) fuses, bimetallic PTC fuses, and ceramic positive temperature coefficient (CPTC) fuses. Each type of PTC resettable fuse has its own advantages and drawbacks. The RUEF300 application field and working principle is a unique PTC resettable fuse developed by Raychem that combines the benefits of PPTC, Bimetallic and CPTC devices.

The RUEF300 is designed for overcurrent protection in applications such as LED lighting, power tools, and industrial machinery. The fuse is built with a combination of PPTC, bimetallic, and CPTC elements that can detect and limit both excessive currents and excessive temperatures. Compared to conventional fuses, the RUEF300 has a fast-acting response and a very low let-through energy, which makes it ideal for applications requiring high levels of protection.

When the RUEF300 is exposed to an elevated current, the PPTC, bimetallic, and CPTC elements are activated in sequence. The PPTC element senses the initial overcurrent and is the first element to be activated. When the PPTC element reaches its extreme temperature, the bimetallic element is triggered, and the current is shut off. The current is further limited by the CPTC element, which increases the resistance of the circuit and lowers the current. Once the current is reduced to a safe level, the CPTC element deactivates, allowing the circuit to restart.

The RUEF300 is made with a multiple-layer construction to maximize reliability and protection. The fuse body is manufactured using a polymeric material to reduce costs and improve the durability of the fuse. The components inside the fuse such as the PPTC, bimetallic, and CPTC elements are tightly assembled and surrounded by a protective shell to ensure that the fuse operates properly. Through these features, the RUEF300 has a high level of reliability and can last for years without needing to be replaced.

The RUEF300 is a modern and reliable overcurrent protection option for applications such as LED lighting, power tools, and industrial machinery. Its combination of PPTC, bimetallic, and CPTC elements provides enhanced overcurrent protection and temperature resistance. The fuse is designed with multiple layers of insulation to ensure its reliability and a protective shell for improved durability. With its quick response and low let-through energy, this fuse can offer necessary overcurrent protection for sensitive applications.

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