ROV14H390K-S-2

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TVS-Varistors, MOVs are widely used in electrical engineering and related fields. ROV14H390K-S-2 is a typical varistor for these applications. Varistors work by providing a non-linear, non-centered and current-limiting characteristic to suppresses the surges which could damage devices or wiring. ROV14H390K-S-2 is made of two electrodes connected to either end of a radial wire lead and protected in a zinc-antimony alloy encapsulated sheath. It is designed to provide a maximum peak surge current protection at specified peak voltage.

This type varistor is suitable for application in electrical noise suppression, medical instruments, automatic instrument and communication equipments, high voltage transformer, EMI filter and control panel. It’s also often used for the protection of power electronic devices in AC/DC systems.

The varistor works on the principle of charge flow redistribution. It uses two electrodes connected to either end of the varistor wire lead. The electrodes are connected to a semiconductor material which partially holds the charge onto the electrodes. As the voltage increases, the charge is forced to move from one electrode to the other and thus the varistor behaves like a non-centering and current-limiting resistor.

The resistance of ROV14H390K-S-2 graded and non-linear, and it is therefore very suitable for applications requiring current limiting and surge protection. It is a unidirectional varistor that dissipates energy in one direction, that of inward surge current, usually towards the protected equipment or wiring. The working voltage of it falls between ± 18V. When its rated voltage is exceeded, a high-speed avalanche breakdown occurs and the varistor is able to discharge current quickly over the allowable limits. This reduces the energy and current of the system. The coated zinc-antimony material ensures the protection from electric arc and oxidation.

ROV14H390K-S-2 is typically tested to meet the EN128986 standards of electric safety. Certified to UL1414-B standards, ROV14H390K-S-2 is suitable for a wide variety of industrial and consumer applications and is ideal for replacing common metal oxide varistors. It is available in different sizes and voltage ratings, depending on the particular application needs. The most common sizes include 38mm, 45mm, 58mm and 70mm. With a peak voltage of 390V, ROV14H390K-S-2 provides superior protection against power surges and system breakdowns.

To sum up, ROV14H390K-S-2 varistor is an excellent surge suppression device which can be used in a wide variety of applications. It is designed to provide a nonlinear, non-centering and current-limiting characteristic to protect against power surges and system breakdowns. It is an economical solution and is available in different sizes and voltage ratings depending on the specific application. The UL1414-B certified varistor meets the EN128986 standards of electric safety and is an industry standard device for surge protection.

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