TMOV34S321M

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TVS, or Transient Voltage Suppression, devices are ideally suited for surge protection applications. They are designed to withstand large, relatively short duration current spikes and overvoltage events. Among TVS devices there are two main categories: Varistors and Metal Oxide Varistors (MOVs) also known as Thermally Protected Varistors (TPVs). MOVs are particularly suited in applications when the precise control of the clamp point voltage and the maximum working voltage are necessary.

The TMOV34S321M is a member of the MOV family of devices. It has a working, or holding, voltage of 321V, which can withstand short duration shift or surge events up to 600V. The peak pulse current rating is 32A and its clamping voltage is 694V. This device, with its gold plated tabs for solder mounting, encapsulated with epoxy-resin making it resistant to moisture and other environmental elements, can be a good choice for a variety of applications as it is low-cost but still provides excellent protection.

The TMOV34S321M offers robust protection in a small package. It is best suited for applications that require a self-sacrificial element to guard against surge, overvoltage and ESD damage. Common applications for the TMOV34S321M include: power supplies, lightning protection circuits, industrial control device, and other electronic products.

The working principle of the TMOV34S321M is quite simple. When there is a voltage spike or surge present, the device will pull the voltage back down to the rated clamping voltage level. It does this through the process of voltage sharing, thermally activation, or avalanche breakdown. It is important to note that the TMOV34S321M is a sacrificial element and should be replaced when it has reached the end of its life after protecting from multiple surge events.

The TMOV34S321M, being a member of the MOV family of devices, is an excellent choice for a variety of applications needing reliable surge protection and precise control of voltage clamping. Its simple working principle and robust protection in a small package make it ideal for single overvoltage applications in a wide range of relativelly low voltage ac circuits.

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