LVR040K-2

Resistance - Initial (Ri) (Min):	600 mOhms
Approvals:	CQC, CSA, TUV, UL
Lead Spacing:	0.200" (5.08mm)
Thickness (Max):	--
Height - Seated (Max):	0.820" (20.90mm)
Size / Dimension:	0.453" L x 0.150" W (11.50mm x 3.80mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-20°C ~ 85°C
Resistance - Post Trip (R1) (Max):	1.9 Ohms
Series:	PolySwitch®, LVR
Time to Trip:	24s
Current - Trip (It):	900mA
Current - Hold (Ih) (Max):	400mA
Current - Max:	5.5A
Voltage - Max:	240V (265V Int)
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction

PTC Resettable Fuses (PRFs) are a type of over-current protection device that is used to protect electrical circuits, equipment, or components from damage due to current overload conditions. These fuses are designed to automatically and safely reset themselves when the current load is reduced.One particular type of PRF is the LVR040K-2 which is designed to interrupt and restore power to a circuit at predetermined current levels. This type of fuse has a wide range of applications in a variety of industries and has recently become the preferred fuse of choice for many engineers and designers.

LVR040K-2 application field and working principle

The LVR040K-2 is a qualified, direct-replace-type fuse which can be used in a wide variety of industries. It can be used as a power distribution fuse in a motor control panel or as a protection device in an industrial control cabinet. It is also suitable for use in power supplies, automotive control systems, generators, transformers, and marine electrical systems.The working principle of the LVR040K-2 is based on the principle of thermal overload protection, using solid state technology to provide self-resetting protection for motors, circuits, control systems, and other electrical systems or components. The device consists of two small pins that protrude from the surface of the fuse. The pins heat up when the load current exceeds its rated current threshold, causing the metal and ceramic core of the fuse to expand. This expansion opens the connection between the two pins, thus interrupting power to the circuit. As the heat dissipates, the core of the fuse contracts, resetting the fuse and restoring power to the circuit.

Advantages of LVR040K-2

The main advantages of the LVR040K-2 are its ability to reset automatically, its durability and reliability, and its low cost. Compared to conventional fuses, the LVR040K-2 is able to provide reliable protection from overload current without the need for manual resetting. The fact that it is a solid-state device also means that it is not susceptible to mechanical wear or damage and can handle both DC and AC power. They also require very little maintenance and are very affordable, making them an ideal choice for complex projects that require reliable and economical circuit protection.

Conclusion

The LVR040K-2 is a cost-effective and reliable fuse that can be used in a wide variety of industries and applications. It uses solid-state technology to provide self-resetting protection from overload current and is able to handle both DC and AC power. The main advantages of the device are its ability to reset automatically, its durability and reliability, and its low cost. With the increasing popularity of PRF technology, the LVR040K-2 is likely to remain the preferred choice for many engineers and designers.

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