RXEF185-AP Circuit Protection

Resistance - Initial (Ri) (Min):	80 mOhms
Approvals:	CQC, CSA, TUV, UL
Lead Spacing:	0.199" (5.05mm)
Thickness (Max):	--
Height - Seated (Max):	0.882" (22.40mm)
Size / Dimension:	0.689" Dia x 0.118" W (17.50mm x 3.00mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	190 mOhms
Series:	PolySwitch®, RXEF
Time to Trip:	12.6s
Current - Trip (It):	3.7A
Current - Hold (Ih) (Max):	1.85A
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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Introduction

PTC Resettable Fuses are thermal-based devices used for overcurrent protection. The typical application is when there is a short circuit condition, the device trips and interrupts the electrical current to protect other components from damage. The RXEF185-AP is a popular PTC Resettable Fuse used for protection in various industries. This article will discuss the various application fields in which the RXEF185-AP can be used and its working principle.

Application Field

The RXEF185-AP is designed to provide reliable and robust overcurrent protection in a variety of applications. One example is in the consumer electronics industry. It is particularly suitable for use in smartphones, tablets, and other mobile devices. The RXEF185-AP is an effective solution for circuit protection in these types of devices as it is able to detect sudden voltage fluctuations and short circuit conditions quickly and accurately. In addition, the RXEF185-AP is also suitable for use in automotive applications. The protection provided by the device is reliable and long-lasting, making it an ideal solution for protection in vehicles. For example, it is suitable for protecting against short circuit and overcurrent conditions in starter motors and alternators. The RXEF185-AP is also used in industrial applications. It can be used for a variety of applications, such as motor and fan protection, as well as in AC/DC power supplies.

Working Principle

The RXEF185-AP is a PTC (Positive Temperature Coefficient) resettable fuses. It is a thermal based device, meaning that it heats up when current passes through it. The RXEF185-AP works in a two-stage action. In the first stage, the device detects an overcurrent condition and trips, interrupting the current and protecting other components from damage. Then, in the second stage, the device resets when the current is below the level at which the device was tripped. The RXEF185-AP has an overload current rating of 1.85A and a tripping temperature of 185°C. This means that it is designed to detect a current of 1.85A and trip to interrupt the current flow when its internal temperature reaches 185°C. This protection is reliable and long-lasting, allowing the device to be reset and used again.

Conclusion

In conclusion, the RXEF185-AP is a PTC resettable fuse used for overcurrent protection in a variety of applications including consumer electronics, automotive, and industrial. It works on a two-stage action of detecting an overcurrent condition and then resetting when the current is below the tripping level. The device is reliable and long-lasting, making it a popular choice for many applications.

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