RXE135

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PTC resettable fuses are an important part of the electronics industry. The RXE135 is a type of PTC resettable fuse that has been widely used and is well-suited for a wide range of application fields. This article will explore the RXE135 application fields and working principle.

1. Introduction to PTC Resettable Fuses

PTC resettable fuses (PTCRFs) are a type of fuses that are designed to be reset after an overcurrent. This type of fuse is particularly useful for items that operating above their rated current such as motors, pumps and transformers. PTCRfs are usually thermally sensitive, meaning that they operate in response to an increase in temperature, and then reset when they cool down.

They also have an anode and a cathode and are unique in that they do not have a traditional fuse element, unlike a traditional fuse. Instead, a PTCRf has a polymeric positive temperature coefficient (PPTC) element that is formed from a network of conducting polymer chains. This element is then connected to two metal plates, which act as the anode and cathode.

PTCRfs offer advantages over traditional fuses, such as the absence of manual resetting and the ability to survived multiple overloading cycles. While they have these advantages, most PTCRfs do have some trade-offs, such as a higher initial cost and a lower current rating compared to traditional fuses and limiting current flow to a certain amount.

2. RXE135 Application Field and Working Principle

The RXE135 is a type of PTC resettable fuse that is manufactured by Phoenix Contact. It is well-suited for a wide range of application fields, such as motor control, lighting protection, battery protection and surge protection.

The RXE135 PTCRf is a self-resettable type of polymeric PTCRf and its maximum allowed working current is 135 A. The RXE135 is designed to have a low resistance and a high breaking capacity, with an ultimate breaking capacity of 10kA. In addition, the OCP reset voltage of the RXE135 is approximately 1.12 (V), which makes it suitable for a wide range of applications.

The working principle of the RXE135 PTCRf is based on the fact that the resistance of the PPTC element increases with temperature. When the current through the fuse exceeds the rated current, the PPTC element will heat up and its resistance will increase. This will cause the resistance of the PTCRf to increase and the current will be restricted and limited, thus preventing further damage from occurring. When the current drops below the rated value, the PPTC element will cool down and the resistance will decrease back to its original value, allowing the current to flow normally again.

3. Conclusion

In conclusion, the RXE135 is a type of PTC resettable fuse that is well-suited for a variety of application fields such as motor control, lighting protection, battery protection and surge protection. The working principle of the RXE135 is based on the PPTC element which increases its resistance when the current through the fuse exceeds the rated current. After the current drops below the rated value, the PPTC element cools down and its resistance decreases back to its original value, allowing it to reset and return to normal operation.

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