RUEF300U

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PTC Resettable Fuses

PTC (Positive Temperature Coefficient) Resettable Fuses are a type semiconductor device used for reliable and efficient current limiting protection against over-current liability. The RUEF300U is one of the most widely used resettable fuses. This article will focus on its application field and working principle.

Application Field of RUEF300U

The RUEF300U resettable fuse can be used in many applications across different industries. In the computing and automotive industries, they are commonly used as protection. This includes over-current protection in power supplies, battery-charging circuits, and back-up and standby power supplies. In the electronics industry, they are used in mobile phones, remote controller, electronic toys, alarm system, security system, and other consumer electronics. In the medical industry, they are often seen in wearable medical device, implants, medical imaging system, health monitoring system, and other medical systems.

Working Principle of RUEF300U

RUEF300U resettable fuse works on a very simple principle. It consists of two main components: an electrical coil and an internal ceramic element. The electrical coil is simply an electrically conductive material, such as copper wire, which is wrapped around a ceramic core. This core is made of a special material that reacts to current. When the current exceeds the rated value of the resettable fuse, the material begins to increase in temperature, which causes it to expand. This expansion increases resistance in the circuit, which causes the current to decrease. This is the resettable fuse’s protection mechanism.

Once the current falls below the rated value, the resistance decreases, and the temperature of the material inside the ceramic core decreases. The material then contracts back to its original size, and the circuit is restored to its original state.

RUEF300U resettable fuses offer many advantages over traditional fuses. For example, they are smaller and lighter, and their resistance to current helps to reduce the risk of damage to components in circuits. Additionally, they can be used in a variety of applications, and they are relatively inexpensive and easy to install.

Conclusion

The RUEF300U is a very popular resettable fuse, and it is widely used in a variety of applications across many industries. Its advantages over traditional fuses make it a very attractive option for a variety of purposes. Its working principle is straightforward and reliable, which makes it a great option for reliable protection against over-current liability.

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