MF-RX250/72-AP

Resistance - Initial (Ri) (Min):	50 mOhms
Approvals:	cURus, TUV
Lead Spacing:	0.402" (10.20mm)
Thickness (Max):	--
Height - Seated (Max):	1.039" (26.40mm)
Size / Dimension:	0.839" L x 0.122" W (21.30mm x 3.10mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	130 mOhms
Series:	Multifuse®, MF-RX/72
Time to Trip:	15.6s
Current - Trip (It):	5A
Current - Hold (Ih) (Max):	2.5A
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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PTC Resettable Fuses

PTC (Positive Temperature Coefficient) Resettable Fuses are widely used in electrical systems, providing instant over-current protection without the need to replace the fuse. They are self-resetting, meaning that when the current overload is removed, the fuse automatically reset and allow the current to flow through the circuit again. The MF-RX250/72-AP is a type of PTC Resettable Fuse which is widely used in many applications, from automotive circuit protection to consumer electronics.

MF-RX250/72-AP Application Field and Working Principle

The MF-RX250/72-AP is a 250VAC/24VDC rated, single-phase PTC Resettable Fuse. It is commonly used in automotive electronics, telecommunications,and consumer products, providing motor control, over-voltage and over-current protection.The MF-RX250/72-AP operates by using the electrical resistance of the PTC element in the fuse. At ambient temperature and normal operating current, the metallic oxide material in the PTC element has a very low resistance. When the circuit is overloaded with current, the element begins to heat up due to the increased current, and the resistance of the element increases. This increases the temperature which in turn causes the resistance to increase further, eventually leading to an open circuit condition and protecting the circuit from further damage.When the circuit overload is removed, the element cools down and the resistance returns to its original low level. This allows the current to flow through the circuit again, meaning the fuse is self-resetting and does not require a service call or replacement.The MF-RX250/72-AP has several benefits which makes it an attractive choice for many applications. Because the fuse is self-resetting, it eliminates the need for service calls or replacement of components, resulting in cost savings. It has a low profile, which makes it ideal for compact applications, and the high breaking capacity means it can handle larger overloads with ease. The fuse is also non-invasive, meaning it does not require cutting or breaking of wires in order to install it.In conclusion, the MF-RX250/72-AP is a single-phase, 250VAC/24VDC rated PTC Resettable Fuse which is widely used in many applications. It is self-resetting, which eliminates the need for service calls or component replacement, and has a low profile for compact applications. The high breaking capacity and non-invasive installation make it an attractive choice for many applications.

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