RUEF700-2 Circuit Protection

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PTC resettable fuses are an important type of current-limiting circuit protection device with the increase of electronic products. The RUEF700-2 is a type of thermally isolation PTC resettable fuse, used as a current-limiting protection device to protect wrong connections between digital components and circuits. This article will explore the applications and working principle of the RUEF700-2.

The RUEF700-2 series is perfect for a range of applications. It is especially suitable for projects that rely on microcontroller IO power supply, controlling relays, solid-state relay, AC/DC converters and other digital components which require isolation in terms of safety and pressure. It is also suitable for applications demanding high current capacity as well as for LED power supplies, direct charging current and blocks with high power and high density due to its low resistance value. Furthermore, the device can also be used on applications with high switching speed as it has low temperature rise and self-resetting switching.

The RUEF700-2 series employs a PTC resettable fuse relying on a high-quality and durable metal-glass seal as its power device. It has a self-recovery PTC resettable fuse function to ensure stable output current in order to protect the equipment from wrong connections, high temperature, and over current. Its structure is simple and reliable, and its temperature coefficient is low and current amplitude is stable. Additionally, the device is capable of safely passing two times its rated current for 5s.

When the device is in a normal working condition, current flows through the unblocked PTC resettable fuse, the power component starts to heat up, and the PTC thermostat enters the positive temperature coefficient (PTC) state, allowing the current to flow normally. When the PTC current reaches the power component\'s rated current, it will enter the over current protection (OCP) state and its resistance will increase which will reduce the current flowing further. Once the current is reduced to below the rated current, the fuse will start to cool down and reset itself to its original state and allow the current to flow normally again.

The RUEF700-2 series offers numerous advantages. It has a high working accuracy when compared to other PTC resettable fuse and it also offers a high level of EMI/RFI protection which can be used in high-voltage applications. Additionally, it has a short-circuit protection function and it is also compatible with all standard safety regulations. Furthermore, it offers a high-current capacity and because of its low working temperature, it is suitable for air-tight environments.

The RUEF700-2 series has a wide range of applications and has been used in various fields. It is commonly used in industrial automation, medical systems, consumer electronics, and automotive electronics. In the industrial sector, it is used to provide surge protection and current limitation in control systems, motion systems, solar systems, and smart grid systems. In the consumer electronics sector, it is used for mobile applications and tablets and also in home and office appliances.

The working principle of the RUEF700-2 is relatively simple. When current flows through the device, it enters the PTC resettable fuse state, then when the PTC current reaches the rated value, it will enter the over current protection (OCP) state, reducing the current level until it is reduced to below the rated current, in which case the device will reset itself to its original state and allow the current to flow normally again.

In conclusion, the RUEF700-2 is a thermally isolated PTC resettable fuse that offers a range of advantages, such as high working accuracy, high current capacity, and short-circuit protection. It is widely used in various applications and its simple working principle makes it a reliable choice for a range of applications.

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