YQZ120N1.20 Circuit Protection

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PTC resettable fuses are essential components for providing circuit protection in portable electronics. One of the most well-known PTC resettable fuses is the YQZ120N1.20. This particular fuse is designed to protect circuit components from overcurrent both during normal operation and thermal overloads. In order to accomplish this task, it utilizes a specialized Temperature Controlled Reactive Device (or TCRD) which creates an internal resistance. This internal resistance increases as the temperature of the fuse increases, effectively limiting the current passing through the circuit.

The YQZ120N1.20 is a two-piece device with a molded Polymeric Positive Temperature Coefficient (PPTC) element and a metal terminal specifically designed for easy connection. The terminals are created using nickel-plated steel for superior corrosion resistance and a secure connection. The PPTC element is a ceramic material encased in a high-grade moldable plastic for reliable and consistent performance as temperatures change. It is designed for use in AC circuits of up to 120V and up to 1.2A.

The working principle behind the YQZ120N1.20 is that when an over-current condition occurs, the temperature of the fuse rises. This temperature increase causes the PPTC element to expand, increasing the internal resistance of the fuse. This increase in resistance limits the amount of current that can pass through the fuse, effectively protecting the circuit components from over-current damage. As the temperature drops, the PPTC element returns to its original state, effectively resetting the fuse and allowing it to be used again.

The YQZ120N1.20 PTC resettable fuse is an ideal choice for a variety of applications. Due to its reliable performance and low reaction time, it is ideal for products like gaming consoles, portable electronics, and other consumer products that require circuit protection from both normal and thermal overloads. It is a great choice for both designers and manufacturers seeking a reliable PTC fuse to protect their electronics.

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