V551HG34

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Transient voltage suppressors (TVS) have long been used to protect a variety of electronic circuits from potential damage caused by transient electrical overstresses. The primary type of device used for such protection is the voltage-variable resistor, or varistor. These varistors are typically composed of zinc oxide varistors (ZOVs), metal oxide varistors (MOVs) or gas discharge tubes (GDTs). Of these three components, the MOV has proven to be the most effective in a variety of situations.

The V551HG34 is a radial leaded metal oxide varistor (MOV) series specifically designed to protect low voltage equipment from damaging voltage transients. These varistors are offered with a wide range of voltage ratings, ranging from 6.5V to 220V, and high current ratings up to the thousands of amperes in single pulse applications. The V551HG34 can be used to protect a variety of devices and systems such as telecommunications and RF equipment, low voltage mains input/output power supplies, lighting, audio and video equipment, and consumer electronics.

The working principle of the V551HG34 is quite simple. When the voltage across the MOV exceeds its rating, it triggers a dielectric breakdown effect which causes a low resistance path to be established between the terminals. This effectively shorts out the transient voltage, and effectively reduces any overvoltage and overcurrent peaks which may appear on the system. The surge current is then able to pass harmlessly through the MOV and be safely dissipated.

At normal operating levels, the resistance offered by the V551HG34 is much higher than when it is triggered by an overvoltage event, thus preventing any false triggering of the MOV. The surge capability of the V551HG34 also allows for a wide range of operating temperatures and voltages, making it ideal for use in a variety of applications.

In addition to its primary purpose of protecting a device or system from overvoltage incidents, the V551HG34 can also help reduce EMI/RFI in sensitive electronic equipment. This is due to the high frequency of the MOV\'s surge current, which can help dampen out any high frequency noise that may be present. Since EMI/RFI interference can cause problems in a variety of electronic circuits, the V551HG34 is often used as an effective means of preventing this interference from damaging a system.

In conclusion, the V551HG34 is a metal-oxide varistor that is designed to protect a variety of low voltage equipment from potentially damaging voltage transients. Its working principle is based on the establishment of a low resistance path between its terminals when the voltage across the MOV exceeds its rating, thus shorting out the current in order to prevent any overvoltage and overcurrent peaks. The V551HG34 is also capable of reducing EMI/RFI in sensitive electronic systems, making it useful for a wide range of applications.

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