PFRA.400.3 Circuit Protection

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PTC Resettable Fuses are devices which contain an internal positive temperature coefficient, or PTC. These popular devices are used in applications that require a reliable and cost-effective over-current protection. The PFRA.400.3 consists of a bistable thermistor-relay and solid state circuit components. The fail-safe operation is alarm or warning free.
The PFRA.400.3 is commonly used to protect motor coils, switching power supplies, motherboards, circuit boards, LED lighting systems, and more. The device works by detecting a change in the current flow and then reacting to shut down the power when the rated current is exceeded. The over-current protection is accomplished quickly by using the self-resetting and high speed thermistor-relay internal component.

The PFRA.400.3 is designed to be an efficient and reliable over-current protection device. It has a low power consumption and generates minimal heat, allowing better control and excellent performance. It is designed to be injectable into a wide range of devices and systems, making it an ideal choice for many applications. The device also offers a wide range of operating temperatures and fast response times.

The working principle of the PFRA.400.3 is relatively simple. When the current flowing through the device is below the rated current, the bistable thermistor will remain in its deactivated state. When the current exceeds the rated limit, the thermistor will activate and trigger a fast shutoff. The circuit then resets itself and the device will continue to monitor the current flow. This process can be repeated multiple times as necessary and the device can handle multiple start-stop cycles.

The PFRA.400.3 can provide reliable and robust over-current protection for many applications and systems. It is a low-cost option and can be easily installed and maintained. The device is also highly reliable and offers a wide range of features and protection levels to meet the requirements of various environments and applications. The PFRA.400.3 is an efficient and cost-effective over-current protection device and is a great choice for many applications.

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