BSPM1A440D585LV

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TVS - Varistors, MOVs

Metal oxide varistors (MOVs) are a type of transient voltage surge suppressor (TVS) device designed to prevent damage caused by voltage spikes. The BSPM1A440D585LV is an example of a low voltage, high current MOV that provides protection from lightning and other transient voltages. In this article, we will look at the application field and working principle of the BSPM1A440D585LV.

Application Field

The BSPM1A440D585LV is a general-purpose varistor with a nominal voltage of 3.3V and a peak current rating of 440A. This device is suitable for use in a variety of applications, including power supplies, automotive, telecom, and consumer electronics. It is especially well-suited for protection against transient voltages, such as those caused by lightning strikes. The device is UL approved and CSA certified, making it an excellent choice for reliable surge protection.

Working Principle

MOVs work by blocking excessive voltage spikes with a low impedance path to ground. The low impedance allows the MOV to absorb the surge energy without damaging the protected circuit. The BSPM1A440D585LV has a clamping voltage of 10V, meaning it will divert current away from the protected circuit until the voltage drops below 10V. Once the voltage drops below 10V, the MOV returns to its non-conductive state and will not interfere with normal circuit operations.

The BSPM1A440D585LV utilizes a ceramic disc to store and transfer energy during a surge event. When a voltage surge occurs, the discs become polarized and form a conductive path to ground. This conductive path absorbs the voltage spike and prevents it from reaching the protected circuit. The BSPM1A440D585LV also utilizes a built-in thermal fuse to protect against currents higher than it is rated for.

Conclusion

The BSPM1A440D585LV is an excellent choice for surge protection in a variety of applications. Its low voltage, high current rating, UL approved certification, and built-in thermal fuse make it an ideal solution for protecting critical electronics from damaging voltage spikes. By understanding the application field and working principle of the BSPM1A440D585LV, you can make an informed decision about whether it is the right choice for your project.

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