RGE500

PTC Resettable Fuses: RGE 500 Application Field and Working Principle

A PTC (positive temperature coefficient) resettable fuse, also known as PPTC (polymeric positive temperature coefficient), is a solid-state device designed to protect electrical or electronic systems when currents and/or temperatures exceed a certain threshold. RGE500 is a type of polymeric positive temperature coefficient fuse (PPTC) with a rated current of 0.5A and a rated voltage of 32V. It is suitable for a wide range of automotive, electronic and consumer safety applications, especially in the headlights, brake lights, rearview mirrors and windshield demisters used in modern cars.

As a protection device, RGE500 presents a low impedance that limits a surge or overcurrent and its resettable function allows it to turn off automatically if an overcurrent occurs. In other words, it can be used as a safeguard against over current and over temperature situations in various electrical/electronic components.

The working principle of the RGE500 series of PTC resettable fuses can be summarized as follows: when the current passes through the fuse, thermal energy causes the material to transition from a semi-conductive state to a non-conductive state. At this point, the current is limited to the rated current of the fuse. When the fuse reaches the resetting temperature, it will transition back to a semi-conductive state and restore the current.

RGE500 series PTC resettable fuses have a high temperature coefficient characteristics, meaning that when the ambient temperature increases, the resistance of the fuse increases exponentially. This ensures the safety of the system because in case of overload, the fuse will heat up quickly and limit the current before it can cause any damage.

RGE500 series also has a high current capacity and low self-heating characteristics which makes it ideal for a wide range of applications. From automobiles to consumer electronics, this fuse can provide a safe and reliable protection for any device or system. Additionally, it has a long life cycle and can be used over again, so it is a cost-effective solution for any system protection.

In conclusion, RGE500 series of polymeric positive temperature coefficient fuses (PPTC) are ideal for a large range of applications from automotive to consumer electronics products. They are small in size and offer high current capacity with low self-heating. Moreover, they are highly reliable and cost-effective as they can be used multiple times and have a long life cycle.