ROV05H121K-S

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A varistor, or varistor diode, is an electronic component made of a semiconductor material with ohmic contacts at both ends. A varistor is a voltage-dependent, nonlinear device similar to a Zener diode. The MOV - Metal Oxide Varistor - is the most popular type of varistor and is commonly used in surge protection to protect equipment against sudden electrical changes such as lightning strikes, power outages, and other electrical power surges. An MOV is typically a disc of a grey-black substance with two leads on the sides, and it works by restricting the flow of electrons passing through it by a small amount. This small constriction causes a voltage spike or surge to be restricted.

The ROV05H121K-S is a popular kind of varistor and is used in many electronic applications, such as in household appliances, computers and other electrical/electronic devices. It is constructed of metal oxide semiconductors, making it resistant to over-voltages and other power disturbances. It has a clamping voltage of 121 Volts, and a pulse current rating of 14.7 Amps, meaning it can safely absorb and dissipate large amounts of energy.

The working principle of the ROV05H121K-S is relatively simple. When the voltage across its terminals rises to the rated value, the breakdown process is triggered and electrons begin to flow. This electron flow is controlled by an electric field inside the MOV, and this field will force the electrons away from the terminals, resulting in a reduction of the voltage across the MOV. The voltage will then remain low until the electrical field breaks down and the electrons can flow freely again. Basically, it’s like a valve that opens and closes very quickly, releasing and absorbing energy.

In summary, the ROV05H121K-S is a varistor suitable for many applications. It is made of metal oxide semiconductors, has a clamping voltage of 121 Volts, and a pulse current rating of 14.7 Amps, making it a good choice for surge protection. It works by controlling the electron flow through it by means of an electric field, which causes it to absorb and dissipate energy effectively when a voltage spike occurs.

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