PFLR.550 Circuit Protection

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PTC Resettable Fuses, a type of polymeric positive temperature coefficient (PPTC) resettable devices, are widely used in electronic circuits to protect from overloads or short circuits. These devices offer several benefits, such as fast response time, durability, and reliable protection at affordable cost. PTC Resettable Fuses are available in many sizes and shapes, depending on the specific application. The most common types of PTC Resettable Fuses are the PFLR.550, which offers a unique combination of electrical characteristics and safety features.

The PFLR.550 is a small, radial-lead, flat, unidirectional device that can provide up to 250V and can be mounted on a circuit board or panel. The device has a current rating of 550mA and is capable of controlling both short-term and continuous overloads. The PFLR.550 also has an over-temperature sensing mechanism, allowing it to sense when the temperature of the surrounding environment is beyond the permissible limits and open the circuits. This provides an extra layer of protection and allows system performance to be maintained even in extreme conditions.

The PFLR.550 has a working principle that allows it to react to temperature increases more rapidly than a conventional fuse. When in normal operation, it is in the low-resistance, on-state, allowing current to flow through the circuits. If the device senses an overload or short circuit, it begins to heat up and its resistance increases until it reaches the device\'s hold current. This increase in resistance will automatically reduce the current flowing through the circuit and reduce the risk of damage.

PFLR.550 devices can be used in a variety of applications, such as power supplies, LED lighting, remote control systems, industrial control systems, power conversion units, AC/DC power supply, DC/DC converter, regulators and many others. In these applications, the device offers reliable protection from voltage surges, overcurrents, and over-temperatures, providing a safe and efficient environment for electronic components.

The advantages of using PFLR.550 devices include their fast response time, their robust construction, and their cost effectiveness. The device\'s flat construction also allows for easy mounting on circuit board. Furthermore, the device has a wide temperature range, allowing it to be used in both cold and hot environments. Currently, the PFLR.550 is becoming increasingly popular in a number of industrial and commercial applications, due to its reliable protection and cost-effectiveness.

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