RXE110-2

Resistance - Initial (Ri) (Min):	150 mOhms
Approvals:	CSA, TUV, UL
Lead Spacing:	0.199" (5.05mm)
Thickness (Max):	--
Height - Seated (Max):	0.689" (17.50mm)
Size / Dimension:	0.504" Dia x 0.118" W (12.80mm x 3.00mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	--
Resistance - Post Trip (R1) (Max):	380 mOhms
Series:	PolySwitch®, RXE
Time to Trip:	8.2s
Current - Trip (It):	2.2A
Current - Hold (Ih) (Max):	1.1A
Current - Max:	40A
Voltage - Max:	72V
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction to PTC Resettable Fuses

PTC, or Positive Temperature Coefficient, resettable fuses are an essential component in many electronic devices such as computers, TVs, mobile phones, and more. These resettable fuses, also known as PPTC fuses or self-resetting fuses, provide overcurrent protection of power devices. This allows them to protect both the device and wiring from overload or short-circuit damage. Basically, when PTC resettable fuses detect an overload or short circuit, they respond to the high current by rapidly heating up. This increases their internal resistance, which causes the current to drop and the circuit to slow down or stop. Then, when the circuit cools off, the fuse\'s internal resistance returns to its original value and the circuit resumes normal operation. The key advantage of PTC resettable fuses is that they protect circuits automatically and can be reset and reused.

RXE110-2 Application Field and Working Principle

The RXE110-2 is a multi-function PTC resettable fuse from Eunicell. It is a highly reliable solution for overcurrent protection and can be used in a wide range of applications, such as automotive, electrical, household appliances, and general industrial. The RXE110-2 provides three levels of protection: overcurrent, thermal, and reverse connection. First, the overcurrent protection component can detect when the current in the circuit exceeds the preset limit and quickly reduce the current to the safe maximum. The thermal protection is designed to protect the circuit and other connected components from overheating. Finally, the reverse connection protection can detect the reverse condition of the connected power sources, thus providing full protection against power supply spikes and other common issues. The RXE110-2\'s operating principle is very simple and straightforward. When a current in excess of the max rating is established, a movement occurs between the internal elements which increases the core gap, thus raising the internal resistance, which limits the current. When the overcurrent situation is over, the internal elements move back to their original position and the circuit can continue operating normally. Overall, PTC resettable fuses, such as the RXE110-2, are becoming increasingly important to power-electronic devices. Their ability to quickly detect and respond to overcurrent conditions, as well as their long service life, makes them a reliable and cost-effective solution.

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