RXEF090S-2 Circuit Protection

Resistance - Initial (Ri) (Min):	200 mOhms
Approvals:	CQC, CSA, TUV, UL
Lead Spacing:	0.199" (5.05mm)
Thickness (Max):	--
Height - Seated (Max):	0.622" (15.80mm)
Size / Dimension:	0.441" L x 0.118" W (11.20mm x 3.00mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	470 mOhms
Series:	PolySwitch®, RXEF
Time to Trip:	7.2s
Current - Trip (It):	1.8A
Current - Hold (Ih) (Max):	900mA
Current - Max:	40A
Voltage - Max:	72V
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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PTC Resettable Fuses

A PTC Resettable Fuse, commonly known as a RUEF, is a type of fuse that combines a PTC (positive temperature coefficient) circuit with a conventional resettable circuit. This type of resettable fuse is designed to reset itself after a brief current overload. The RXEF090S-2 is an example of this technology. The purpose of this article is to discuss the application field and working principle of RXEF090S-2 PTC Resettable Fuses.

Application Field

RXEF090S-2 PTC Resettable Fuses are mainly used in automotive applications to provide protection for electrical and electronic components. They are often used as an alternative to regular fuses in vehicles, as they offer a higher level of protection in terms of voltage drop, voltage spike, and temperature surge. RXEF090S-2 fuses are also suitable for circuit protection in electrical and electronic equipment, including computers, TV sets, and other electronic appliances.

Working Principle

RXEF090S-2 PTC Resettable Fuses are designed to reset themselves after a brief overload. This is achieved by the use of a PTC circuit, which uses a PTC thermistor as its key component. The thermistor is a semiconductor that is made from a ceramic material that has a positive temperature coefficient, meaning that its resistance increases when it is heated.When the PTC thermistor is exposed to a current overload, it acts as a resistor and causes a high current trip. The current through the thermistor is then reduced, and as the temperature of the thermistor decreases, its resistance decreases and the circuit is reset. The result is that the fuse is in a closed state, which allows for normal operation.The RXEF090S-2 has a current rating of 90 amps and a voltage rating of 125 volts. It is also UL and CSA approved and supports low-leakage current. As such, it is suitable for use in a wide variety of applications.

Conclusion

RXEF090S-2 PTC Resettable Fuses are designed to protect electrical and electronic components from current overloads and surges. They offer a higher level of protection than regular fuses and are suitable for a wide variety of applications. The RXEF090S-2 also has a current rating of 90 amps and a voltage rating of 125 volts, making it ideal for automotive and electronic equipment protection.

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