PFRA.025.2 Circuit Protection

PTC Resettable Fuses have become an increasingly popular type of safety components for circuit protection, due to their fast response time to overcurrent, ease of use, collapse-proof construction, and self resetting properties. The PFRA.025.2 is one such fuse, designed to detect overcurrents in a wide range of electronic and electrical applications. This article will examine the current application field of this particular type of fuse, and also discuss its working principles.

Application Field

The main application of the PFRA.025.2 is protection of equipment and systems that is vulnerable to overcurrent. This includes power supplies, communication systems, power transformers, power over Ethernet (PoE) systems, and numerous other types of electrical and electronic systems. These devices can be found in a range of industries including medical, aerospace, automotive, industrial, and communication equipment. As such, this device has a broad range of practical uses.

For example, one common use of the PFRA.025.2 is in the medical imaging industry. This equipment is often highly sensitive to overvoltages and overcurrents, as they contain delicate electronic components. The PFRA.025.2 is used in medical imaging systems to sense these overcurrents and quickly shut off the power to the device. This can prevent expensive equipment from being damaged by an overvoltage or overcurrent.

Working Principle

The working principle of the PFRA.025.2 is relatively simple. This device consists of a ceramic core which, when exposed to an overcurrent, raises its temperature and expands. This expansion causes the contacts of the device to break, which cuts off the flow of electricity. Once the overcurrent is removed, it allows the device to reset and the contact is restored.

The PFRA.025.2 is designed to be used in applications with temperatures between -200°C and +150°C, and can be triggered with currents as low as 5 mA. The device is designed to have a low resistance, which guarantees quick resetting. It is also designed to have a long life span and be resistant to shock and vibration.

Conclusion

PFRA.025.2 resettable fuses are a versatile, highly reliable type of fuse ideal for circuit protection in a variety of applications. Their application field ranges from medical imaging equipment to power transformers, and their fast response time to overcurrent allows them to protect valuable electronic equipment from damage. They also feature a simple but effective working principle, allowing them to be reset quickly after an overcurrent is detected.