MF-LS180

Resistance - Initial (Ri) (Min):	40 mOhms
Approvals:	cURus, TUV
Lead Spacing:	--
Thickness (Max):	0.039" (1.00mm)
Height - Seated (Max):	--
Size / Dimension:	0.984" L x 0.199" W (25.00mm x 5.05mm)
Package / Case:	Strap
Mounting Type:	User Defined
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	120 mOhms
Series:	Multifuse®, MF-LS
Time to Trip:	2.9s
Current - Trip (It):	3.8A
Current - Hold (Ih) (Max):	1.8A
Current - Max:	100A
Voltage - Max:	24V
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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PTC Resettable Fuses: MF-LS180 Application Field and Working Principle

PTC Resettable Fuses, or Polymer Positive Temperature Coefficient (PPTC) fuses, are an innovative new type of fuse that can be used to solve many different circuit design, installation, and maintenance problems. They are constructed of a special polymer material that has a positive temperature coefficient of resistance, meaning that when heated, the resistance of the fuse increases, thus effectively interrupting the current flow. In this article, we will discuss the application field and working principle of MF-LS180, a model of a PTC Resettable Fuse.

Application Field of MF-LS180

The MF-LS180 is designed to protect equipment from short-circuits and overloads. The fuse is used widely in surge protection, power adaptors, and medical equipment applications. Its small size, high current rating, fast response time, and high interrupting capability enable it to provide reliable and robust protection. The fuse is available in various voltage and current ratings, making it versatile for a range of circuits and equipment.

Working Principle of the MF-LS180

PTC Resettable Fuses work on a simple principle- they create a temperature-dependent resistance within the fuse. This temperature-dependent resistance is created by a special polymer material inside the fuse, which has a positive temperature coefficient of resistance.When the current flowing through the fuse rises to its trip current rating, the fuse begins to heat up. As the temperature of the fuse increases, the resistance of the fuse also increases. This increases the voltage drop across the fuse, cutting off the flow of current. Once the fault is cleared, the fuse slowly cools down to its original, low-resistance state, and the current flow is restored. This process allows the fuse to reset itself and continue to protect the circuit from overloads and short-circuits.

Advantages of the MF-LS180

The MF-LS180 has several advantages compared to other types of fuses. These advantages include:• The fuse has a fast response time that can detect overloads and short-circuit conditions within milliseconds.• The fuse is capable of handling large surge current, up to 15 times the rated current.• The fuse can be reset manually after an overcurrent or short-circuit condition, allowing it to continue to protect the equipment after the event has been corrected.• The fuse provides reliable protection against surges, overloads, and short-circuits.

Conclusion

The MF-LS180 is a PTC Resettable Fuse that provides reliable protection against short-circuits and overloads. It has a fast response time and high current rating, making it ideal for use in surge protection, power adaptors, and medical equipment applications. The fuse is easy to reset manually after an event, and its robust construction ensures consistent performance.

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