RGEF300

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PTC Resettable Fuses, also known as Polymer-based Positive Temperature Coefficient resistors, are electrical devices that act as circuit-protection devices. In the event of an electrical surge, overload or short circuit, the PTC Resettable Fuse will automatically trip and break the circuit, protecting it from further damage.

The RGEF300 is a PTC resettable fuse, designed specifically for use in automotive and industrial control applications. It is a thermally activated device, with a through-hole metal package and a low profile of 2.8mm. It offers a very high current rating of up to 300A, making it perfect for applications such as motor control, LED lighting or other high-current devices. The RGEF300 is a RoHS compliant RoHS-2 device, making it environmentally friendly and safe for use in many applications.

The working principle of the RGEF300 involves two distinct phases. During the first phase, the PTC resettable fuse does not conduct, acting as an open circuit. When a surge, overload or short circuit occurs, the temperature of the PTC increases, causing an increase in its resistance. This resistance increases non-linearly, providing instant protection to the circuit and limiting the further increase of current.

In the second phase, once the current has been limited, the PTC resettable fuse begins to cool. As it cools, its resistance decreases and it reverses from an open to a closed circuit. This is the reset phase, allowing the circuit to resume normal operation once the temperature has dropped below a pre-defined threshold. This resetting process allows the RGEF300 to be used repeatedly, providing efficient circuit protection without the need for replacing the fuse.

The RGEF300 PTC Resettable Fuse is an ideal choice for any application that requires circuit protection from surges, overloads and short circuits. It offers a high current rating and fast response times, making it suitable for use in automotive and industrial applications. As a RoHS-2 compliant device, it is safe and environmentally friendly, making it the perfect choice for many applications.

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