YQA120N4.2 Circuit Protection

PTC Resettable Fuses are devices that provide overcurrent protection for electronic circuits by acting as current-limiting elements. They have been developed to provide a solution to restore the safety function after an over-current condition. They are operated in two modes: normal operating mode and overload protection mode. The YQA120N4.2 is one such device, and its application fields and working principle are discussed in depth below.

Application Fields

The YQA120N4.2 is suitable for over-current protection in LED lighting, power supplies, consumer electronics, automotive electronics, industrial electronics, and medical equipment. It is applicable to a wide range of electronic circuits, such as those in DC/DC converters, AC/DC converters, as well as consumer electronics and security applications. Additionally, it can be used in low-voltage, low-power applications, such as White goods, Audio/Video electronics, and computer peripherals.

Working Principle

The YQA120N4.2 is a resettable PTC fuse. When the current flowing through the device is below the predetermined level, the device operates in its normal operating mode. In this mode, the current flows through the device unimpeded. However, when the current flowing through the device exceeds the specified limit, the device trips into its overload protection mode. In this mode, the device acts as a current-limiting element, and the flow of current is restricted to protect the device and the electrical equipment it is protecting. When the current returns to a normal level, the device automatically returns to its normal operating mode. This feature allows for easy resetting of the device after an over-current event. The YQA120N4.2 is designed to be able to withstand high overload currents of up to 120A without damage. It can also maintain a high level of long-term reliability with a lower risk of failure due to its thermally robust construction.

Conclusion

The YQA120N4.2 is a resettable PTC fuse that provides overcurrent protection for electronic circuits. Its application fields span a wide range of electronic circuits, making it suitable for a variety of uses. It is designed to be able to withstand high overload currents of up to 120A without damage, and is thermally robust enough to provide long-term reliability.

YQA120N4.2

Amphenol Adv...

0.96 $

1000

PTC RESET FUSE 30V 280MA ...