PFRA.020.3

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PTC Resettable Fuses are electrical components specially designed to help protect electronic circuits from overcurrent conditions. The PFRA.020.3 is one such device, offering protection for a variety of systems.
The PFRA.020.3 is designed to protect current up to 20 Amps, with an operating temperature of -55°C to 130°C (-67°F to 250°F). It is rated for 250V AC or DC and comes with a flame-retardant enclosure. The device features an integral reset switch for shutter-free resetting, which helps avert the damage that can be caused by component creepage and tracking.
The working principle of the PTC Resettable Fuse PFRA.020.3 is relatively straightforward. The fuse contains a positive temperature coefficient (PTC) thermistor which responds to any overload current by rapidly increasing its resistance. This causes a drop in current flow and automatically shuts off the circuit. The thermistor remains in its highly resistive state until the fault is cleared and the circuit is reset, at which point it rapidly returns to its normal, operating state.
The PFRA.020.3 has a number of applications. It is commonly used in industrial and consumer electronics, such as refrigerators, air-conditioners, mobile phones, home entertainment systems and computers. It is also typically used in appliances and medical equipment. Furthermore, the devices are often used in the automotive industry, for controlling actuators, protecting against short circuits, and for providing protection for control systems, airbag systems and door locks.
The PTC Resettable Fuse PFRA.020.3 is a valuable tool for any system that requires protection from excessive current. Its simple design and operation ensure reliable protection, and its flame-retardant enclosure makes it an excellent choice for industrial and automotive applications. The device is also robust and resilient enough to endure a wide range of temperatures.

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