MF-RX012/250U-0

Resistance - Post Trip (R1) (Max):	16 Ohms
Approvals:	cURus, TUV
Lead Spacing:	0.201" (5.10mm)
Thickness (Max):	--
Height - Seated (Max):	0.394" (10.00mm)
Size / Dimension:	0.236" L x 0.150" W (6.00mm x 3.80mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Series:	Multifuse®, MF-RX/250
Resistance - Initial (Ri) (Min):	6 Ohms
Current - Hold (Ih) (Max):	120mA
Current - Max:	3A
Voltage - Max:	60V (250V Int)
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction to PTC Resettable Fuses

PTC (positive temperature coefficient) resettable fuses are very simple yet effective electrical components that are used to protect circuits from current overloading and other forms of damage. They work by utilizing the PTC thermistor effect, which causes a temperature increase as the current through the device increases. This temperature increase will eventually cause a break or "trip" in the electrical circuit, which will then stop the current flow and protect sensitive parts from further damage.

Uses of PTC Resettable Fuses

PTC resettable fuses are often used in a variety of different applications for a number of reasons. One of the most common uses is for over-current protection, which is when a device needs protection from low or high levels of current. In this type of application, the PTC resettable fuse will wake up and trip the circuit when it senses that the current has exceeded safe limits.PTC resettable fuses can also be used for primary and secondary power distribution, as well as for transient voltage suppression (TVS). Additionally, they are often used in many common household appliances and consumer electronics such as washing machines, dryers, air conditioners, electric toothbrushes, printers, routers, and more.

MF-RX012/250U-0 Application Field and Working Principle

The MF-RX012/250U-0 is a PTC resettable fuse designed for over-current protection in low-power applications. It can be used in consumer electronics, home appliances, and other low-power circuits. The fuse has a current rating of 0.12A (250mV drop) with a maximum continuous current of 0.25A.When it comes to how the MF-RX012/250U-0 works, it utilizes the thermistor effect of the PTC material to protect low-powered circuits from over-current. As more current flows through the fuse, the temperature of the PTC material will rise, eventually causing it to trip and cut off the current flow. Once the fuse trips, it must be manually reset by pressing the reset button on the fuse. This will reset the PTC material and allow current to flow again. However, if the over-current is not corrected, the fuse will trip again and need to be reset.

Conclusion

PTC resettable fuses are an effective way to protect circuits from over-current and other danger. The MF-RX012/250U-0 is a small, low-powered PTC resettable fuse designed for use in consumer electronics, home appliances, and other low-power circuits. It utilizes the thermistor effect of the PTC material to detect over-current and can easily be reset once it trips.

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