72R090XPR

PTC resettable fuses are powered devices made up of polymeric PTCs that provide a required level of overcurrent protection and easily reset themselves for reuse. Unlike conventional fuses, these fuses possess the ability to trip and reset automatically on detecting overcurrent or short circuit conditions, which makes them superior to classic fuses in electrical systems. The 72R090XPR resettable fuse belongs to this type of fuses.

Application Field of 72R090XPR Resettable Fuse

The 72R090XPR resettable fuse is primarily used for preventing short circuit in electrical systems, and hence ideal for use in the automotive, industrial and consumer markets. It can be found in many automotive/motorbike applications, like in engine control units, airbag systems and ABS, for example. It is also frequently used in hardware applications like circuit boards, adaptors, UPS systems, UPSs, surge protectors and the like.

Furthermore, this versatile resettable fuse is often used in high power applications such as solar energy, robotic systems, or electric vehicle batteries. Thanks to its high capacity, the 72R090XPR resettable fuse can handle current up to 150A, ensuring reliable protection of these types of electrical systems.

Working Principle of 72R090XPR Resettable Fuse

The 72R090XPR resettable fuse is a three-terminal device, with one terminal acting as an input, a second as an output, and a third for resetting. When the current flow through the input terminal is above the specified current, the polymeric PTC undergoes a rapid automatic change from a low conductive to a high conductive state. This is what causes the tripping of the device and it stops the current flow. This is how it provides overcurrent protection.

After the current flow has been stopped, if the current is reduced to normal levels, the polymeric PTC automatically reverts to its low conductive state and the current is allowed to flow through the device. This process, known as resetting, takes place without the manual operation of any switches. It is all a matter of managing the temperature within the fuse. This makes PTC resettable fuses a much more convenient option than classical fuses.

Conclusion

The 72R090XPR resettable fuse belongs to the family of PTC resettable fuses, which have the advantage of automatically tripping and resetting upon detecting overcurrent conditions. It\'s application field is mainly automotive, industrial and consumer electronics, but it can also be used to protect solar energy, robotic systems and electric vehicle batteries. The working principle of this device relies on a polymeric PTC which changes its conductivity when exposed to high currents.