5ET 2-R

Fuses are electrical components designed to protect electrical systems from damage caused by excess current. 5ET 2-R fuses, also known as a Resettable Fuse, offer the unique capability of returning to the original current rating after the overcurrent event, making them an important part of a safe and reliable power system.

2-R Fuse Application Field

2-R fuses are usually used in industrial applications where fast overcurrent protection is needed. These applications include military environments, power systems in the aviation/aerospace industry, medical equipment, telecommunications systems, and consumer electronics. Due to their high electrical characteristics and precise speed at which they react to surges and other issues, they are well-suited for industrial environments.

2-R Fuse Working Principle

2-R fuses are designed using a combination of a current sensing element and a thermal wire. When an electrical surge or over-current flows through the fuse, it causes the current sensing element to heat up. This heat is then transferred through the thermal wire to the switching element which is calibrated to react to the temperature and open the circuit. This process is done quickly and reliably which prevents further damage to the power system. After the surge or over-current is controlled, the current sensing element cools down and the fuse automatically returns to its original current rating and can be used again.

Conclusion

The 5ET 2-R fuses are an important part of a reliable and safe power system due to their ability to protect against over-currents and return to their original current rating after the surge is controlled. Being used mainly in industrial applications, they provide quick and precise protection and are an appropriate choice for various sectors, such as military, aerospace industry, medical equipment, telecommunication and consumer electronics.