MF-RX110-005

Resistance - Initial (Ri) (Min):	150 mOhms
Approvals:	cURus, TUV
Lead Spacing:	0.201" (5.10mm)
Thickness (Max):	--
Height - Seated (Max):	0.662" (16.84mm)
Size / Dimension:	0.427" L x 0.122" W (10.84mm x 3.10mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	380 mOhms
Series:	Multifuse®, MF-RX
Time to Trip:	8.2s
Current - Trip (It):	2.2A
Current - Hold (Ih) (Max):	1.1A
Current - Max:	40A
Voltage - Max:	60V
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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PTC Resettable FusesPTC resettable fuses (PTC RFs) are electronic devices used to protect circuits from overcurrent conditions. The MF-RX110-005 is a typical example of a PTC resettable fuse. PTC RFs are also known as polymeric positive temperature coefficient (PPTC) fuses, because they use a polymeric material to act like a thermostatic switch. They are composed of two main parts – a sensing element and a control element.The sensing element of a PTC RF acts like a conventional fuse by allowing current to flow through it up to a certain level. This current is determined by the size of the sensing element, but is usually much lower than with a standard fuse. When the current exceeds this level for too long, it causes a reaction in the sensing element which increases its resistance and eventually stops the flow of current. This is referred to as the tripping point.The control element of a PTC RF is what allows it to be "resettable", meaning that after the tripping point is reached, the current flow can be restored simply by removing the source of power or briefly breaking the circuit and then reapplying power. The control element acts like a gatekeeper and retrieves information from the sensing element about the current level in the circuit. If it determines that the current is above the tripping point, it will open up to prevent further damage to the circuit.Because of their ability to automatically sense current and shut off the flow when it exceeds a certain limit, PTC RFs are used in a variety of applications where standard fuses would be inadequate. These applications typically involve delicate electrical equipment or products that are exposed to dangerous levels of voltage or current. For example, they can be used to protect computers, household appliances, communications equipment, electronic components and circuits, mobile phones, automotive applications, and even aircraft systems.The MF-RX110-005 in particular is designed to protect circuits from overvoltage or overcurrent conditions, and can be used to guard against short circuits, surges, and spikes. It features a DC current rating of up to 110A and has a Voltage Rating of 55V (Max), making it suitable for high-load applications. It is also highly durable and qualified for use in harsh environments, making it a good choice for protecting expensive equipment in industrial, automotive, and consumer electronics applications.In addition to being a reliable overcurrent protection device, the MF-RX110-005 also acts as a no-blow fuse. This means that it will trip before reaching the typical surge energy levels where conventional fuses would blow. This feature gives it the advantage of being able to restore power quickly, allowing it to act like a reset switch and protect circuits from further damage.PTC RFs are an ideal choice for protecting electronic devices from potentially damaging currents. They are simple to install, cost-effective, and provide added flexibility compared to traditional devices. The MF-RX110-005 is a good example of the advantages that PTC RFs can offer in terms of current protection and circuit resiliency.

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