LR4-1300SSF

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PTC resettable fuses are important electronic components used in power-management applications, and LR4-1300SSF is a type of such resettable protection device. It is designed to provide reliable overcurrent protection for multiple applications including sub-circuits, equipment, and even power supplies.

LR4-1300SSF resettable fuses are available in several sizes – 2.7 × 4.0 mm, 2.7 × 5.0 mm, 5.2 × 6.1 mm, 4.4 × 6.5 mm, 6.0 × 8.4 mm, 5.2 × 8.2 mm and 7.2 × 10.0 mm – for various currents and voltages. The device is composed of a conductive polymer as the active element, a pair of nickel-plated copper terminals, and a flame-retardant PBT resin housing. The resin housing also serves to mount the device to a printed-circuit board.

The LR4-1300SSF is designed to protect electronic circuits from excessive current resulting from inrush, overcurrent, overvoltage, and short-circuits. Its working principle is based on PTC technology, where the device conducts current up to a certain level. When the current reaches a predetermined level, the device begins to self-regulate, limiting the through current to the hold current level.

The resetting action occurs when the current is reduced to a safe level, meaning the LR4-1300SSF provides self-resetting protection to the circuit. Furthermore, when the current reaches the current rating, the device will not trip until the voltage is above 5 V. This feature makes the LR4-1300SSF particularly suitable for low-voltage circuits.

LR4-1300SSF is ideal for applications in remote power systems, lighting equipment, perimeter security systems, and other areas where overcurrent protection is critical. Its precise current ratings, small size, and ability to self-reset make it very attractive for power-management applications. Additionally, the device is approved to IEC, UL, and CSA standards for protection up to 250 V AC/DC.

In summary, the LR4-1300SSF is a reliable resettable fuse used for overcurrent protection of multiple applications. It is based on PTC technology and is available in several sizes to meet varying current and voltage requirements. The device is approved to IEC, UL, and CSA standards and is suitable for remote power systems, lighting equipment, and perimeter security systems.

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