PTGL09AR250H8B52B0

PTC resettable fuses, usually known as POLYFUSE, are the self-resetting protection devices which are used for circuit protection against over-currents. They offer advantages over traditional one-shot fuses, such as reset after every over-current event and much greater current carrying capacity. PTC resettable fuses are widely used in consumer, industrial, automotive and medical applications.

PTGL09AR250H8B52B0 is one kind of PTC resettable fuse which is designed for the protection of circuits in home appliances, industrial equipment, computers, telecomm and other communication equipment. This PTC resettable fuse is a shunt type device and utilizes the self-resetting characteristic of the proprietary, patent poled PTC thermistor. It features high current rating, very low hold current, fast reset time, long service life and resistance to external over-voltage.

Application Field of PTGL09AR250H8B52B0

PTGL09AR250H8B52B0 provides high current rating and extremely low hold current, so it is especially suitable for applications in which circuit breakers and fuses cannot reach required levels of current protection. It is mainly used where normal electric current is possibly over-heating, or short-circuiting might occur. This PTC resettable fuse can be applied in energy storage power monitoring systems, medical equipment protection, LED lighting power management, household appliances protection, computers, telecomm and communication equipment protection, etc.

Working Principle of PTGL09AR250H8B52B0

The working principle of this PTC resettable fuse is based on self-resetting characteristics of the proprietary patent poled PTC thermistor. It consists of a metal oxide film that can detect a certain temperature threshold. When an over-current or over-heat event occurs, the current flow would create heating on the metal oxide film. Once this temperature threshold is reached, the metal oxide film will expand and form a large resistance. At this moment, the fuse would “trip”, i.e. if the current is greater than the rating of the fuse, the current will no longer flow. Thus, the over-current event will be stopped. The PTC will automatically cool down and reset after the current is no longer detected. This self-resetting cycle could be repeated many times without any performance degradation.

In summary, PTGL09AR250H8B52B0 is an ideal PTC resettable fuse for applications with high current rating requirement and relatively low hold current. It provides high current protection capability and over-current protection and resetting capability. This PTC resettable fuse could be applied in many consumer, industrial, automotive and medical applications.