MICROSMD200LR-2

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PTC Resettable Fuses are a type of self-resetting semiconductor current protection device. When the current (I) reaches the over-current protection threshold level, they trip and provide internal resistance to the circuit, thereby greatly reducing the current passing through the device. In turn, the power supplied from the circuit is weakened. When the protective fuse has operated and the fault is removed, the self-resetting fuse resets itself, allowing for normal operation.

MICROSMD200LR-2 Application Field and Working Principle

The MICROSMD200LR-2 is a PTC Resettable Fuse designed to protect against over-currents in consumer electronics, automotive, medical, and industrial applications. This type of fuse offers protection against short circuits, overloads, reverse current and overtemperatures, and is compact and lightweight compared to conventional fuses.

The MICROSMD200LR-2 uses a PTC thermistor in combination with a metal housing to reduce the amount of current flowing through the circuit. It works by tripping when the current over-current protection threshold is exceeded, typically in the range of 0.1-2.0A (can be customized). It then provides a high-resistance trip path and therefore reduces the current to the circuit.

When the condition has been rectified, the fuse will reset itself, allowing the current to flow to the protected device. This feature allows a single fuse to protect against multiple occurrences of over-currents. It also eliminates the need for manual resetting or replacement of the fuse.

In the MICROSMD200LR-2, the PTC thermistor is encased in a metal housing which offers protection against mechanical breakage. The fuse is also rated to operate at high temperature, making it suitable for use in harsh working environments. The device also features over-temperature protection, ensuring the fuse will not be damaged in the event of prolonged exposure to high temperatures.

The MICROSMD200LR-2 is available in several current ratings, depending on the application. It can be mounted directly on a PCB or installed in a plug-and-play system to protect against various potential faults. Additionally, the device can be configured to provide either local or remote indication of over-currents.

The MICROSMD200LR-2 is a reliable, cost-effective solution for protecting against over-currents. Its self-resetting function and high-temperature resistance make it ideal for harsh industrial and consumer applications, while its flexibility, cost, and size advantages make it an attractive option for OEMs and system designers alike.

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