RXE090-2

Resistance - Initial (Ri) (Min):	200 mOhms
Approvals:	CSA, TUV, UL
Lead Spacing:	0.199" (5.05mm)
Thickness (Max):	--
Height - Seated (Max):	0.622" (15.80mm)
Size / Dimension:	0.441" Dia x 0.118" W (11.20mm x 3.00mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	--
Resistance - Post Trip (R1) (Max):	470 mOhms
Series:	PolySwitch®, RXE
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Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Introduction to PTC Resettable Fuses

PTC Resettable Fuses,also known as polyfuses, are used as overcurrent or overvoltage protection systemsin a wide variety of electrical and electronic devices. They are designed to provide a reliable way to protect AC and DC circuits from short circuits. Unlike traditional fuses,PTC Resettable Fuses are not blown and replaced when they encounter an overload, but rather react by changing their impedance and thus preventing further damage to the circuit. This means that once the current has been reduced to an acceptable level, the protection can be restored simply by pressing the reset button or toggling the switch.

RXE090-2 Application Field and Working Principle

RXE090-2 PTC Resettable Fuses are typically used in impedance protection circuits for AC/DC circuit applications, such as mobile chargers, telephone handsets, and toys. They are designed for a hold current up to 0.9A with a resettable current of 1.8A. With its maximum operating voltage rated at 28V, it can help protect up to 28V AC or DC circuits.The working principle of RXE090-2 PTC Resettable Fuses is based on the structure of a ceramic disc fused between two metal plates. This arrangement generates a resistive element between the two electrical contacts that generates heat when current passes through it. When the current reaches a certain level above the hold current, the heat generated increases exponentially. At this point, the PTC Resettable Fuse triggers and impedance begins to increase exponentially, rising the power dissipation and temperature of the disc until it reaches a temperature capable of melting the internal fusible element. This will cause the current to be reduced to a safe level and the device will reset once the current is reduced.

Advantages of RXE090-2 PTC Resettable Fuses

The RXE090-2 PTC Resettable Fuses are designed with several advantages over traditional fuses. Firstly, the resettable nature of these devices eliminates the fault of repeatedly replacing a blown fuse. They are also(electronically) non-inductive, meaning that the devices do not naturally create electricity, eliminating the chances of short circuits. Furthermore, as they do not suffer from mechanical fatigue, they offer greater reliability than older fuse designs. Additionally, they are resistant to vibration, which makes them suitable for use in applications such as automotive electronics where vibrations are commonplace.Finally, PTC Resettable Fuses such as the RXE090-2 offer improved system security, as they will autonomously reset when faults are detected, enabling the system to resume normal operation. This not only speeds up recovery from an overcurrent or overvoltage situation, but also reduces the chances of more serious damage from occurring in the system.

Conclusion

In conclusion, the RXE090-2 PTC Resettable Fuse offers a reliable and cost-effective alternative to more traditional fuse designs, with improved security, vibration resistance, and the capacity to automatically reset without the need for manual intervention. It is ideal for applications that require both AC and DC protection, such as mobile chargers, telephone handsets, and toys.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description