RXEF160-AP Circuit Protection

PTC Resettable Fuses: RXEF160-AP Application Field and Working Principle

PTC (positive temperature coefficient) resettable fuses, also known as polymeric positive temperature coefficient devices, provide an innovative solution for current protection in electrical systems. RXEF160-AP is a new type of PTC resettable fuse from the RESPOND (RXEF) series. It is rated for 160 V alternating current (A.C.) making it suitable for a wide range of applications around the industrial, automotive, and residential sectors. This article will explain in detail the application fields and working principles of RXEF160-AP.

Application Fields

The rated voltage of the RXEF160-AP allows it to be used in various AC applications up to 160 volts. It is ideal for protecting multiple DC pcb boards, as well as motors, switches and other such devices, from dangerous current or overcurrent situations. It is also used in many motor controllers which require standard AC sources and therefore need an electrical safety device. The device can be utilized to protect from a broad range of current; from as low as 0.8 A, to as high as 16 A. Furthermore, the maximum operating temperature of RXEF160-AP is eighty five degrees Celsius, making it suitable for a wide variety of environments.

Working Principle

PTC resettable fuses use a heat sensitive polymer film instead of a metal wire as in the case of a standard fuse. When the current going through the them is below the rated value, a low resistance allows it to let the current flow. When the current reaches the rated value, the polymer catalyst undergoes a phase change from a low resistance to a high resistance state, blocking the current and protecting the device. When the current is raised above the rated value, the polymer heats up even further, leading to a further reduction in resistance which increases even more the current. This creates an unstable condition which, if not promptly corrected, can damage the circuit.

When the problem causing the overload is removed, the excessive heat dissipates and the device cools down to its normal operating temperature, resetting itself to a low resistance state.

Conclusion

RXEF160-AP is a highly reliable PTC resettable fuse, with many applications across a wide range of sectors. Its rated current and voltage, as well as its maximum operating temperature makes it a versatile and useful device that stays safe even in hazardous conditions. Furthermore, its working principle ensures both overcurrent protection and current safety. RXEF160-AP is sure to stay a popular choice for many years to come.