72R110XU

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PTC resettable fuses, also known as polymeric positive temperature coefficient (PPTC) devices, are electrical components designed to provide overcurrent protection and improve the safety level of the circuit design. The 72R110XU is a special type of resettable fuse produced by Littelfuse, Inc. This fuse is specifically designed for applications where a long-term overcurrent protection is necessary. In this article, we will discuss the application field and working principle of the 72R110XU.

Application field

The 72R110XU resettable fuse is a self-restoring overcurrent protection device designed for consumer and commercial applications. It is widely used in automotive electronics as a primary power distribution component. The fuse is also well suited for use in many electronics industries, such as telecommunications, LED lighting, lighting control, home automation, audio and video, and industrial automation. The compact size, low power dissipation, and high current limiting capabilities make this fuse an ideal choice for use in these industries.

Working principle

The 72R110XU resettable fuse consists of a semiconductor device embedded within a one-time use thermal fuse. The semiconductor device has a positive temperature coefficient (PTC) that increases the resistance of the device when exposed to higher temperatures. This allows the fuse to act as both a resistor and a switch. When the current flowing through the fuse exceeds the pre-set current threshold, the temperature of the device increases, causing the resistance to increase. This, in turn, reduces the current flowing through the device and prevents it from exceeding the specified threshold level. When the current flows below the threshold level, the device cools and the resistance decreases, thereby restoring the circuit to its original state.

Conclusion

The 72R110XU resettable fuse is a reliable and efficient overcurrent protection device. It has a wide range of applications in various industries, and the compact size and low power dissipation make it ideal for use in consumer and commercial electronics. Moreover, the operating principle of the fuse allows it to provide long-term protection to the circuit and to restore itself when overcurrent protections are triggered. All these features make the 72R110XU resettable fuse a highly attractive choice for overcurrent protection.

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