MF-LR550S

Series:	Multifuse®, MF-LR
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Obsolete
Moisture Sensitivity Level (MSL):	--
Type:	Polymeric
Voltage - Max:	10V
Current - Max:	100A
Current - Hold (Ih) (Max):	5.5A
Current - Trip (It):	10.5A
Time to Trip:	5s
Resistance - Initial (Ri) (Min):	9 mOhms
Resistance - Post Trip (R1) (Max):	22 mOhms
Operating Temperature:	-40°C ~ 85°C
Ratings:	--
Mounting Type:	User Defined
Package / Case:	Strap
Size / Dimension:	1.417" L x 0.283" W (36.00mm x 7.20mm)
Height - Seated (Max):	--
Thickness (Max):	0.039" (1.00mm)
Lead Spacing:	--
Approvals:	cURus, TUV

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PTC Resettable Fuses are widely used as the circuit breaker and overload protection in many electronic devices. The MF-LR550S is a particular type of PTC-resettable fuse that is widely used for circuit protection in various electronic applications. This article will discuss its application fields and working principle.The MF-LR550S PTC Resettable Fuses are widely used in a large variety of consumer and industrial electronic device applications. It is commonly used as a circuit breaker in LED lighting solutions, as a protection device for utilities, as an over-current protection device in electric vehicles, and as a remote on/off switch in mobile device applications. It is also commonly used in high-temperature environments, such as in electric motors and HVAC systems.The working principle behind the MF-LR550S PTC Resettable Fuses is simple. When a circuit is overloaded, and it exceeds the current rating of the fuse, the resistance of the Polymeric Positive Temperature Coefficient (PPTC) element in the fuse rises to an extremely high level. This extremely high resistance prevents the current from flowing, thereby opening the circuit and triggering the breaker. Once the over-current condition is remedied, the fuse will reset automatically, allowing the circuit to resume normal operation.The PTC Resettable Fuses are capable of providing circuit protection while still allowing high currents to flow when needed. Many of the features that make these fuses desirable includes their ability to withstand high temperatures, their compact size, their cost effectiveness compared to other types of fuses, and their simple design. As a result, the MF-LR550S PTC Resettable Fuses are ideal for a variety of applications, including high temperature motors and HVAC systems, lighting, utilities, and electric vehicles.The MF-LR550S PTC Resettable Fuses also offer a number of advantages over other types of circuit breakers and over-current protection devices. It is highly reliable, as it will only open the circuit when the current exceeds the fuse\'s current rating, preventing the circuit from being damaged by over-currents. It is also relatively long-lasting, as it is capable of resetting after being triggered and does not require replacement like many other types of fuses and circuit protection devices. Furthermore, it is easy to install, requires minimal maintenance, and can be controlled remotely.In conclusion, the MF-LR550S PTC Resettable Fuses provide a great solution for a variety of application fields that require circuit protection. It offers a reliable, cost effective, and long-lasting solution for various electronic and industrial applications. Its working principle is simple, yet extremely effective, and its compact size makes it extremely useful in many applications. As a result, the MF-LR550S PTC Resettable Fuses are an ideal solution for any application that requires circuit protection.

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