72R030XU

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PTC Resettable Fuses

PTC (positive temperature coefficient) resettable fuses are becoming one of the most popular types of safety devices, providing timesaving and cost-saving advantages in many different applications. PTC resettable fuses are self-resetting devices, designed so that when an overcurrent situation is encountered, the fuse automatically shuts off power to the circuit being protected. Once the overload condition is removed, the fuse will automatically reset and allow the circuit to return to normal operation.

72R030XU application field and working principle is one example of a PTC resettable fuse. This particular model is a 30 amp PTC resettable fuse approved to UL 248-14. It is primarily used in automotive, appliance, computer and consumer electronics applications to increase the safety and performance of those products. It is also capable of withstanding high voltage and low current, which makes it suitable for many other applications.

The working principle of a 72R030XU is based on the non-linear characteristics of its PTC thermistor element. When current passes through the thermistor, it heats up and begins to change its resistance. When the current flowing through it exceeds a certain threshold value, the resistance of the thermistor will exponentially increase, resulting in the fuse being “tripped.” When the current falls back below this threshold value, the thermistor will cool down and its resistance will drop back to normal levels, resetting the fuse.

Due to its easy installation and reliable performance, the 72R030XU has become a popular choice for many applications. It is an ideal solution for providing over-current protection in applications that require a fast response time and an automatic reset capability. It is also cost-effective, providing a safe, reliable and easy to use solution for protecting electronic equipment.

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