YQS8070 Circuit Protection

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PTC Resettable Fuses

PTC resettable fuses, or positive temperature coefficient (PTC) fuses, are safety devices that are designed to protect electronic circuits from over-current failures and electrical fires. They are self-resetting and can be used in a variety of applications from stationary sources to high-powered automotive applications. The YQS8070 resettable fuse is one of many that has become increasingly popular around the world due to its efficiency, safety, and low-cost.

YQS8070 Application Field

The YQS8070 resettable fuse is designed for overcurrent protection of low-voltage battery operated applications, including computer peripherals, consumer electronics, LEDs, and residential appliances. It has a high current capacity with a rated current range from 0.1A to 10A with a hold time of 6 seconds at 3 times of nominal current. YQS8070 is also suitable for DC motor protection and is compatible with UL, CUL, and VDE standards.

Working Principle

A YQS8070 resettable fuse uses a body-based PTC thermistor as the switching element. When current flows through the element, it quickly heats up and changes its electrical resistance. This increases the voltage drop across the fuse, which in turn causes the current to decrease. When current is below a certain level, the element cools down and the resistance returns to its original value. The cycle then repeats itself, with the resettable fuse resetting itself after each cycle.

The main advantage of the YQS8070 resettable fuses is that they are able to automatically reset themselves in the event of an overcurrent situation, eliminating the need for manual resetting and saving time and cost. Additionally, they provide better protection than traditional fuses due to their fast thermal response, and also feature improved noise rejection and excellent long-term stability.

Conclusion

In applications where overcurrent protection is needed, YQS8070 resettable fuses are becoming increasingly popular due to their low cost, efficient operation, and safety. With its high current capacity, fast thermal response, improved noise rejection, and excellent long-term stability, the YQS8070 can offer protection in a variety of applications from small consumer electronics to high-powered automotive systems.

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