RXEF020-AP Circuit Protection

Resistance - Initial (Ri) (Min):	1.83 Ohms
Approvals:	CQC, CSA, TUV, UL
Lead Spacing:	0.199" (5.05mm)
Thickness (Max):	--
Height - Seated (Max):	0.461" (11.70mm)
Size / Dimension:	0.291" Dia x 0.118" W (7.40mm x 3.00mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	4.4 Ohms
Series:	PolySwitch®, RXEF
Time to Trip:	2.2s
Current - Trip (It):	400mA
Current - Hold (Ih) (Max):	200mA
Current - Max:	40A
Voltage - Max:	72V
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Box (TB)

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PTC Resettable Fuses: RXEF020-AP Application Field and Working Principle

PTC (positive temperature coefficient) resettable fuses are popular devices that are widely used in various industrial applications, and RXEF020-AP is one of them. The RXEF020-AP* provides reliable protection to a wide range of industrial applications by automatically resetting after an overload current event. This article will discuss the application field and working principle of the RXEF020-AP and how it can be used to improve safety and efficiency in different industrial settings.

Application Field

The RXEF020-AP is suitable for use in a variety of applications, from commercial to industrial scale. Some of the most common applications include automotive, consumer electronics, power adapters, and data centers. It can also be used in industrial automation systems, such as PLCs, AC motors, and power supplies. In these types of applications, RXEF020-AP can help to protect a wide range of electronic components from damage due to overvoltage and overcurrent conditions.

Working Principle

The RXEF020-AP works by utilizing a number of components, including a PTC thermistor, an integrated circuit (IC) and some resistors. The PTC thermistor is the main component, which has a temperature-dependent resistance. When the current exceeds a preset value, the resistance of the PTC thermistor rises dramatically, creating a high impedance to the current flow. This high impedance causes the voltage across the circuit to drop significantly, which turns off the electronic components in the circuit.The RXEF020-AP also includes an IC that can monitor the current flowing through the circuit. This data is then used to adjust the resetting point, meaning that the PTC thermistor can automatically reset after a certain time and temperature. This resetting point can be adjusted to provide optimal protection to the circuit.

Advantages

The RXEF020-AP provides a wide range of advantages over traditional fuse systems. It eliminates the need for manual resetting, which can be a tedious process. The PTC thermistor also provides better current protection than a regular fuse, as it responds faster and more accurately to an overcurrent situation. Additionally, the resetting point can be set to provide a greater degree of protection for electronic components. Finally, the RXEF020-AP is also less likely to fail due to vibration or other environmental factors, which is a major benefit over traditional methods.

Conclusion

The RXEF020-AP is a reliable device that provides protection to a wide range of industrial applications. The device utilizes a number of components, including a PTC thermistor and an integrated circuit, to provide both current protection and automatic resetting. This feature helps to eliminate the need for manual resetting and allows for more efficient and safer operation in various industrial settings. With its wide range of application fields and advantages, the RXEF020-AP is an excellent choice for those looking to achieve better safety and efficiency in their industrial projects.

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