V251HA40

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TVS (Transient Voltage Suppressor) and MOVs (Metal Oxide Varistors) are two of the most important types of surge protection devices. Both types are designed to provide protection for components and circuit boards from ESD (Electrostatic Discharge) related transients, over-voltages, and surges in power supplies. While MOVs and TVS offer very similar surge protection capabilities they do have a few key differences.

The V251HA40 is an example of a MOV device. A MOV is a nonlinear metal oxide varistor. It is designed to provide protection for equipment from momentary over-voltages. MOVs work by diverting excessive voltage away from vulnerable components that may otherwise be damaged by a voltage surge. MOVs also act as a resistor to limit the flow of current.

In the case of the V251HA40, this device has an absorption voltage of 40VAC and a holding voltage of 34VAC. It has an energy absorption capability of 6J with a maximum peak current of 3.3KA. Additionally, the V251HA40 has a high impulse sparkover rating of 1750V (10X1000).

In terms of the application field, the V251HA40 is typically used in low-voltage devices. These include appliances, electronic systems, consumer electronics, and motors. They can also be used in power supplies, switches, transformers, circuit breakers, LED lighting, motors, and other AC/DC power sources.

In terms of the working principle, MOVs are designed to quickly shut down when there is a sudden surge in voltage or current. This helps to protect vulnerable components and circuit boards from being damaged due to over-voltage. The MOV works by diverting excessive voltage away from the component or circuit board through a resistance path. This resistance path limits the flow of current, protecting the components from being damaged.

When a MOV is used in an application, it should be selected based on the expected surge strength, the maximum current, and the peak current. This information is usually provided in the MOV’s datasheet. When installing the MOV, it is important to ensure that it is properly mounted and regulated to ensure a safe and reliable surge protection solution.

In summary, the V251HA40 is a MOV device. It is designed to provide protection from voltage surges, over-voltages, and ESD transients. It is typically used in low-voltage applications such as appliances, electronic systems, consumer electronics, motors, and power supplies. The working principle of MOVs is to quickly shut down when there is an excessive voltage or current, thus protecting components and circuit boards from damage.

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