MF-SM150-2-006

Resistance - Initial (Ri) (Min):	60 mOhms
Approvals:	cURus, TUV
Lead Spacing:	--
Thickness (Max):	0.118" (3.00mm)
Height - Seated (Max):	--
Size / Dimension:	0.344" L x 0.264" W (8.75mm x 6.71mm)
Package / Case:	2-SMD
Mounting Type:	Surface Mount
Ratings:	AEC-Q200
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	250 mOhms
Series:	Multifuse®, MF-SM
Time to Trip:	5s
Current - Trip (It):	3A
Current - Hold (Ih) (Max):	1.5A
Current - Max:	100A
Voltage - Max:	15V
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: MF-SM150-2-006 Application Field and Working Principle

PTC Resettable Fuses are a particular type of fuse used to break an electrical circuit of appliances and machines when an overload of electricity occurs. These fuses are also known as polyfuses, polymeric positive temperature coefficient, positive temperature coefficient (PTC) fuses, PPTC fuses, and Multifuse.Originally developed for use in aerospace and automotive applications, PTC Resettable Fuses are now widely used in a variety of industries including computer and communications, consumer electronics, medical, and industrial. The MF-SM150-2-006 is one example of this type of fuse.

Application Field

The MF-SM150-2-006 is suited for applications operating with power up to 6 amps. It is used in applications where overloading or short-circuiting of the systems can potentially damage themselves or nearby components. This particular fuse can also provide extra protection from unintentional miswiring, and acts as a reliable resettable switch when subjected to low-voltage and static conditions.Featuring a robust construction and a wide operating temperature range between -40°C to 125°C, MF-SM150-2-006 PTC Resettable Fuses are suited for use in high-grade automotive, power supply, compute, telecommunications, consumer electronics, and other applications which require reliable circuit protection.

Working Principle

PTC Resettable Fuses work by containing a resistor made of polymeric material with a positive temperature coefficient (PTC) that changes its resistance value when subjected to a current higher than its rated current and higher temperatures.When an overload or short circuit occurs in the circuit, the resistor quickly heats up, thus increasing its resistance up to many times of its initial value, resulting in the cut of the current. The resistor stays at a high resistance state until it cools off and returns to its initial value. This manually resetting process is what makes these fuses highly reliable and durable.The operating principle of the MF-SM150-2-006 is relatively simple. When the current goes above its rated value, the fuse quickly heats up and the temperature rises until the resistance increases to a high value. At this point, the fuse has tripped and the current stops. Once the reset button is pressed, the fuse will cool down and the current will resume as normal. The cycle can be repeated over and over without any degradation to the fuse.

Conclusion

PTC Resettable Fuses have become popular due to their ability to protect circuit components from damage caused by overloads and short circuits. The MF-SM150-2-006 is a reliable and robust PTC Resettable Fuse, rated for up to 6 amps, and suited for use in high-grade automotive, power supply, compute and telecom applications. It works in principle by using a PTC resistor that quickly heats up when a current higher than its rated current value is detected. This quickly increases its resistance, cutting the current and allowing the fuse to be manually reset when it cools down. This makes PTC Resettable Fuses highly reliable and durable.

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