72R075XPR

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PTC Resettable Fuses are protection devices that help protect circuitry from overloads, short circuits, and minor open circuits. They are also known as positive temperature coefficient (PTC), difet, poly fuse, x-fuse, polymeric positive temperature coefficient, or PTC resettable fuses. PTC Resettable Fuses contain a PTC thermistor that acts as a self-resetting heat dissipative device. When the thermistor reaches a particular temperature, it instantly switches from a low-resistance state to a high-resistance state.

One of the most common types of PTC Resettable Fuses is the 72R075XPR. It is an open-circuit protection device with a current rating of 75A and an operating voltage up to 72V. This type of PTC Resettable Fuse has a low voltage drop in the cold state, which helps it to protect the circuit from undesired overloading. It also has a very low current pulse energy rating and is UL certified.

72R075XPR PTC Resettable Fuses are used in a wide variety of applications, including automotive and industrial systems. In automotive systems, they can be used to protect components such as alternators, starters, electronic throttle controls, and electric fuel pumps. In industrial applications, they are used mainly to protect the circuit against overloads due to short circuits or minor open circuits.

The working principle behind the 72R075XPR PTC Resettable Fuses is that when the temperature of the thermistor rises above the set threshold, it switches from a low-resistance to a high-resistance state. In the high-resistance state, the current through the PTC Resettable Fuse is limited, which prevents damage to the circuit due to overloads, short circuits, or minor open circuits. As the temperature of the thermistor cools to below the set threshold, the PTC Resettable Fuse automatically resets and is ready to protect the circuit again.

The 72R075XPR PTC Resettable Fuse is one of the most reliable protection devices for circuits from overloads, short circuits, and minor open circuits. It is UL certified, has a low voltage drop in the cold state, and has a very low current pulse energy rating. Furthermore, it is used for a wide range of applications in automotive and industrial systems. Last but not least, its working principle is based on the switching of a temperature-sensitive thermistor from a low-resistance to a high-resistance state, which limits the current through the fuse in the event of an overload or short circuit and automatically resets when the temperature drops back to normal.

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