MF-SM050-2-006

Resistance - Initial (Ri) (Min):	350 mOhms
Approvals:	cURus, TUV
Lead Spacing:	--
Thickness (Max):	0.125" (3.18mm)
Height - Seated (Max):	--
Size / Dimension:	0.287" L x 0.214" W (7.31mm x 5.44mm)
Package / Case:	2-SMD
Mounting Type:	Surface Mount
Ratings:	AEC-Q200
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	1.4 Ohms
Series:	Multifuse®, MF-SM
Time to Trip:	4s
Current - Trip (It):	1A
Current - Hold (Ih) (Max):	500mA
Current - Max:	40A
Voltage - Max:	60V
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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PTC Resettable Fuses: Introduction

Polymer-positive temperature coefficient (PTC) resettable fuses, also referred to as polyfuses, are an industrial electronics safety device designed to protect circuits from excessive current flows and short circuits. The MF-SM050-2-006 is one particular type of PTC resettable fuse.PTC resettable fuses are a type of device known as a positive temperature coefficient. This means that as the temperature rises, the device’s resistance increases. When too much current is applied to the circuit, the resistance of the device will begin to rise, which in turn causes the circuit to heat up. As the temperature increases further, the resistance of the device will increase even more, causing further heating. This chain reaction eventually causes the circuit to reach its limit and the fuse to trip, protecting the circuit by cutting off the excessive current.The MF-SM050-2-006 is a PTC resettable fuse designed for surface mount applications. This particular model has a voltage rating of 6V, a current rating ranging from 0.05A to 2A, and a maximum operating temperature rating of 125°C.

PTC Resettable Fuses: Application Fields and Working Principle

The most common application of PTC resettable fuses is in the protection of electrical and electronic circuits, including those used in computers, home appliances, and consumer electronics. The MF-SM050-2-006 is no exception; it is a versatile device designed for a wide range of applications, from electrical and electronic circuits to automotive systems.In general, the operation of PTC resettable fuses starts with a low-resistance path. When normal currents flow, the device behaves like a low-resistance shunt, allowing current to pass through the circuit. However, when an overcurrent situation arises, the resistance of the device increases rapidly, reducing the current flowing through it and heating up the surrounding circuit components.The increasing temperature will eventually reach a point where the fuse element in the device melts, causing an open circuit in the fuse. This open circuit isolates the circuit components from the power supply, protecting them from further damage. The tripped fuse can be easily reset by simply pressing a button, restoring the circuit to its normal working condition.PTC resettable fuses like the MF-SM050-2-006 are an essential component in today\'s sophisticated electronic equipment. They provide reliable protection against overcurrents and shorts circuits, and their reset capability allows engineers to quickly diagnose and fix problems in a cost-effective manner.

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