YQB120N9.40

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PTC Resettable Fuses are commonly used in circuit protection operations, and the YQB120N9.40 is no exception. This article focuses primarily on the application field and working principle of the YQB120N9.40.

Application Field

The YQB120N9.40 is typically deployed in application fields where a durable, reusable fuse solution is needed. It is widely used for applications in the automotive industry, especially electric and hybrid vehicles. Its main purpose is to protect circuits in applications such as electric drives, Motor Inverters, and high-power electronic systems. Due to its durability and reliability, it is also found in other applications such as Uninterruptible Power Supplies (UPS), industrial and electrical equipment, and general control signals.

Working Principle

The YQB120N9.40 works by using a PTC (Positive Temperature Coefficient) material to sense a circuit\'s current flow. When an overcurrent situation happens, the PTC material will heat up, causing its resistance to drastically increase and effectively stopping current flow. Unlike traditional fuses, the YQB120N9.40 can be reset by reducing the circuit\'s current to a value below its current rating. This makes the YQB120N9.40 a non-destructive solution to protecting circuits since it does not require the user to replace the fuse after it\'s been activated.

Conclusion

The YQB120N9.40 is a reliable, reusable, and durable PTC Resettable Fuse. It provides protection to circuits from damaging overcurrents and short circuits in a wide variety of applications. Thanks to its ability to be reset, it is a popular option for the automotive industry and its wide variety of applications, as well as in general control systems and Uninterruptible Power Supplies (UPS).

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