YQB120N0055

PTC Resettable Fuses

PTC Resettable Fuses are a type of electric fuse that can be used to secure a device from over current or short circuit. They provide a reliable protection for the device by detecting the fault and then decreasing the current it is supplying or totally shutting down the power to prevent damage. This type of fuse can be used in a variety of areas from industrial sites to consumer products.

The YQB120N0055 is one such resettable fuse which is designed for low voltage and power applications. It provides protection against short circuit and overload conditions by tripping and then automatically restoring power once the fault has been cleared.

Application field

The YQB120N0055 has a wide range of applications. It can be used in electrical devices such as computers, monitoring systems, automotive, telecommunications, industrial equipment and medical products. It is also suitable for applications such as charger protection, LED driver circuits, lithium battery protection, motor protection and power supply protection.

Working principle

The YQB120N0055 is a polyfuse, or PTC Resettable Fuse, which works by detecting the amount of current passing through it. When the current exceeds the preset limit, the device trips and shuts off the power to the device. Once the fault has been cleared, the device will automatically reset and restore the power.

The device contains a number of components such as a PTC resistor and controlling chip, and they all work together to make sure the power is shut off in the event of an overcurrent or short circuit. When the current exceeds the preset limit, the PTC resistor will increase its resistance and reduce the current running through it. This will cause the voltage drop on the fuse to rise, whereupon the controlling chip will trip and shut off the power.

Once the fault has been cleared, the controlling chip will detect it and reset the device, restoring the power. The resetting time of the device is quick, typically within 27ms.

Conclusion

The YQB120N0055 is a type of resettable fuse designed for low voltage and power applications. It is suitable for a wide range of applications, such as computers, monitoring systems, automotive, telecommunications, industrial equipment and medical products.

The working principle of the device is based on a PTC resistor and controlling chip. When the current exceeds the preset limit, the PTC resistor will increase its resistance and reduce the current running through it. This will cause the voltage drop on the fuse to rise, whereupon the controlling chip will trip and shut off the power. Once the fault has been cleared, the device will reset and restore the power automatically.

The YQB120N0055 is an ideal choice of resettable fuse for many low voltage and power applications. It is reliable, efficient and easy to install.