RXEF300K-2 Circuit Protection

PTC Resettable Fuses, such as the RXEF300K-2, are located at the beginning of a circuit to ensure that the user does not overload the circuit and cause any damage. The working principle of PTC Resettable Fuses is quite simple: the fuse acts like a switch that is closed when the current set by the user passes through it, and when an overload occurs, the switch opens to protect the circuit.

The RXEF300K-2 is specifically designed for high reliability circuits that have a separate operating and standby power rails. It is an ideal choice for a wide variety of applications, including HVAC, power supplies, medical instruments and automotive systems. It is also suitable for use in industrial power supply, facility power supply, UAVs, LED lighting and aerospace systems.

In operation, the RXEF300K-2 senses the amount of current flowing through the circuit and responds accordingly. If the current level exceeds the user-defined set point value, the PTC Resettable Fuse will open the circuit and protect it from overload. This resetting function prevents the user from having to replace or reset the fuse each time the circuit is overloaded. It will automatically reset once the circuit becomes normal, allowing the user to continue without interruption.

The maximum current of the RXEF300K-2 is 300KAmps and its hold current is 250KA. It has an operating temperature range of -55°C to +125°C, making it suitable for a wide variety of applications and conditions. It also provides high surge current withstanding up to 2000KAmps.

The RXEF300K-2 does not require an external resistor or capacitor for operation and features a low magnetic signature. This makes it easy to install and suitable for use in applications where magnetic signature may be a problem. Additionally, the PTC Resettable Fuse is designed to reduce the temperature rise, allowing for higher power density.

The RXEF300K-2 is UL recognized and is compliant with the RoHS, CE and CSA standards. It is designed for use in a wide variety of applications and is an ideal choice for those looking for a reliable, efficient and cost effective PTC Resettable Fuse.

In conclusion, the RXEF300K-2 PTC Resettable Fuse is a reliable and efficient protective device that is designed to protect circuits from overload. It is suitable for use in a wide variety of applications and provides a simple, cost effective solution for those looking for a reliable fuse. Its low magnetic signature and high surge current withstanding makes it an ideal choice for those looking for a high performance fuse.