LVR055S

Resistance - Initial (Ri) (Min):	450 mOhms
Approvals:	CQC, CSA, TUV, UL
Lead Spacing:	0.200" (5.08mm)
Thickness (Max):	--
Height - Seated (Max):	0.854" (21.70mm)
Size / Dimension:	0.551" L x 0.161" W (14.00mm x 4.10mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-20°C ~ 85°C
Resistance - Post Trip (R1) (Max):	1.45 Ohms
Series:	PolySwitch®, LVR
Time to Trip:	26s
Current - Trip (It):	1.25A
Current - Hold (Ih) (Max):	550mA
Current - Max:	7A
Voltage - Max:	240V (265V Int)
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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PTC Resettable Fuses are a type of fuses that can be reset after being triggered due to an overload of current. They are widely used in many applications, such as power supply, lighting installations, automotive, instrumentation, telecom, and consumer electronics. The LVR055S is a typical PTC Resettable Fuse that utilizes a specially designed metal oxide-containing element with a low initial resistance and an internal heating element. When the load current exceeds the melting current of the fuse, the metal oxide will heat up due to the Joule heating effect, increasing the resistance of the PTC resettable fuse. Since the self-heating effect is strongly temperature-dependent, the self-heating effect will increase further when the temperature rises over a certain threshold. At this point, the current will drop and remain at a stable level until the temperature cools down. The self-restoring characteristics of the PTC resettable fuse make it especially suitable for applications where temporary overloads or short circuits might occur.The PTC resettable fuse is commonly used in consumer electronic devices such as HVAC systems and home appliances, among others.The LVR055S is a PTC resettable fuse with a low initial resistance of 40mΩ, and a maximum steady-state operating current of 5.5A.The maximum temperature rating for the LVR055S is 85℃. Its design allows for a fast response during a sudden over-current condition, preventing any further damages to the load. The S type design also helps reduce the panel space requirement. The working principle of the LVR055S is based on the mechanism of self-resetting that applies to PTC resettable fuses. When the load current exceeds the melting current of the fuse, the metal oxide element in the fuse will heat up due to the Joule heating effect, increasing the resistance of the PTC resettable fuse and causing the current to drop. The temperature will increase until the current drops to a stable level, and the temperature cools down. The PTC resettable fuse will then reset and be ready for further use.The LVR055S can be used in various fields, such as power-supply applications, automotive, instrumentation, telecom, consumer electronics and lighting installations. Due to its small size, low resistance, fast reacting time and self-restoring properties, it is perfectly suitable for overload protection of low-voltage circuits. It is also able to protect high power supplies by resetting the circuit with minimal damage.Due to its low resistance, rapid response and self-resetting characteristics, the LVR055S PTC Resettable Fuse provides an ideal solution for many industry applications. Its high current rating, low profile design and small form factor make it ideal for high power supplies and consumer electronic products. It also provides a reliable and efficient protection solution for vehicles, instrumentation, and telecom equipment.The LVR055S is a cost-effective solution that provides reliable protection for many different applications. Its high current rating and self-resetting capabilities make it well-suited for protecting circuits against excessive currents and overloads. It is also able to provide protection for short circuits and other power disturbances, making it a great choice for many industrial applications.

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