PFRA.090.3.009

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PTC Resettable Fuses, such as the PFRA.090.3.009 are electronic components that are designed to prevent uncontrolled power flow to electrical devices. These fuses are very reliable, as they provide reliable surge protection by responding to an overcurrent situation quickly by “resetting” itself. This resetting is done by using a mechanical thermal reset relay, often referred to as a “fuse resistor”.

The PTC Resettable Fuses are mainly used in computer and other more complicated electronic circuits. They are also often found in power supplies, such as UPS systems, to protect the supply from short-circuits or other dangerous high current events.

The PFRA.090.3.009 has many useful features and benefits. For example, it has a low thermal runaway temperature of just 50°C and provides an effective and efficient way to limit inrush current and power supply over-current. It also has overcurrent protection and temperature monitoring functions. As the temperature rises, the resistance of the fuse increases, helping to protect the circuit. In addition, the PFRA.090.3.009 is effective at reducing the risk of overcurrent damage, as it can reset itself after a power interruption.

The working principle behind the PFRA.090.3.009 is relatively simple. When an overcurrent or overvoltage situation occurs, the internal fuse resistor melts, causing a resistance across the circuit. This resistance reduces the current flow and helps to protect other components from damage. Once the power is turned off, the resistor cools and resets itself, allowing the circuit to return to normal operation.

In conclusion, the PTC Resettable Fuse such as the PFRA.090.3.009 is an excellent choice for protecting electronic circuits. It is a reliable and efficient way to prevent uncontrolled power flow and provides useful features, like overcurrent protection and temperature monitoring. It also has the added benefit of being able to reset itself after a power interruption and is simple to implement.

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