250R120-RFU

PTC Resettable Fuses are one of the most commonly used safety components in the electronics industry. The 250R120-RFU application field and its working principle can be divided into three main components, which are its construction, applications, and advantages.

The construction of 250R120-RFUs involves a polymer material which changes its resistance at a certain currents and temperature. This polymer material is the core of the fuse and is then encapsulated in a plastic interior housing. This exterior is also used as a protection of the unit from the external environment.

These fuses are mainly used when protecting products from over-current and over-temperature events, and are also widely used in electric motors, electrical systems, and electrical equipment. The fuses are not only used to protect products against over current, but are also effective in helping to protect against arc-events, open circuits, and short circuits.

The working principle of the 250R120-RFUs is that when an overcurrent or over-temperature event occurs, the polymer material inside the fuse heats up which causes an increase in the resistance thus reducing the current flow. When the current is reduced, the temperature inside the fuse will drop, and it will automatically reset itself.

The advantages of using the 250R120-RFUs are that they are reusable and can be reset after an event. This makes them more cost effective compared to conventional fuses, as the fuse itself can be reused. The resettable nature of this fuse also makes it useful for products which are likely to experience multiple power events.

Overall, the 250R120-RFU application field and working principle are beneficial for providing protection against over-current and over-temperature events. By using polymer material and an encapsulated housing, the unit is able to reset itself automatically after an event. The unit’s resettable nature also makes it more economical compared to other types of fuses.