LR4-260F

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PTC Resettable Fuses are rapidly becoming a mainstream product for various consumer and industrial applications. These devices have the ability to sense and detect fault currents and reset after the fault condition has been cleared. The LR4-260F is a self-resetting fuse manufactured by Littelfuse that is used widely in the automotive, consumer electronics, and industrial markets. This article will provide an overview of the LR4-260F PTC Resettable Fuse and its application field and working principle.

The LR4-260F is a current-limiting, polymeric PTC (Positive Temperature Coefficient) Resettable Fuse. It has a time-delay element that takes into account inrush currents and has an internal resistance of 1.5 Ohms. It is designed with a large volumetric resistive element to limit fault currents. It is available with a wide range of operating temperatures, from -55°C to 125°C, and has a current rating of 60 Amps.

The LR4-260F is ideal for applications where high inrush or fault currents are expected. It can be used as overcurrent protection with any AC or DC application. Common applications include overvoltage and overcurrent protection, reverse polarity, arc-fault, and surge protection. It is also used in electronic assemblies, battery chargers, lighting fixtures, power supplies, and motors.

The LR4-260F works by limiting the path for current. When the device is activated, it restricts the path for current which causes its internal resistance to increase which limits the current. This causes the fuse to generate heat and this heat is dissipated through the use of a heat sink. When the device is reset, the heat sink dissipates the heat, allowing the internal resistance to decrease which enables the device to work again.

The LR4-260F is a highly reliable, low-cost solution for protecting against overvoltage and overcurrent faults. It occupies less space and eliminates the need for a fuse holder or panel-mount component. Additionally, its design is optimized for superior performance and is UL 1077 approved. This certification ensures safety and compliance in all applicable industries. It is also RoHS compliant, lead-free, and meets the IEC 60384-14 international safety standard.

The LR4-260F is a cost-effective, efficient solution for protecting against fault currents. Its robust design and UL 1077 certification guarantee safety and reliability. Furthermore, it eliminates the need for a fuse holder or panel mount and is RoHS compliant, lead-free, and meets the IEC 60384-14 international safety standards. Its wide range of operating temperatures, current ratings, and features make it an ideal solution for various consumer and industrial applications.

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