ROV14-820K-S-2

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The ROV14-820K-S-2 is a two-terminal protective device used to absorb over-voltage transients generated by electro-magnetic radiation or high-energy switching operations. It is a varistor, also known as a voltage-dependent resistor (VDR), that typically functions as a nonlinear, two-terminal device, used to suppress transient over-voltage scenarios. This type of varistor is a flameproof MOV (Metal-Oxide Varistor) and is designed to survive ambient temperatures up to 180°C for at least 2,000 hours.

The ROV14-820K-S-2 is just one of thousands of types of MOVs that are available on the market. It features low capacitance, excellent high-frequency noise reduction, ESD immunity, and stable electrical performance over temperature and long time periods. MOVs are typically used in applications such as energy storage, surge protectors, transient voltage suppressors, automotive electronic systems, and power supplies. In general, they offer superior protection against electro-magnetic interference (EMI) and electrostatic discharge (ESD).

MOVs work by using an insulation layer between two conducting layers, typically a ceramic oxide layer. When a surge appears, the voltage increases across the insulation layer and causes the MOVs to break down. This causes a small, localized area of current to be discharged through the MOV, thus reducing the amount of energy that can pass through it. As the surge dissipates, the device returns to its original state and is ready to protect another surge if needed.

The ROV14-820K-S-2 is most commonly used for over-voltage transient protection in industrial AC power supplies as well as for voltage clamping and surge protection in DC power supplies. In addition to providing stalwart protection against over-voltage transients, the ROV14-820K-S-2 is also mainly used in applications where there are extremely high-temperature environments or where there needs to be short-duration tolerance for high-temperature operations. The device is typically used in applications such as power converters, rectifiers, switching power supplies, lightning protection, and motor protective equipment.

As part of a larger system, the ROV14-820K-S-2 functions like a relay switch operation. When the voltage or current exceeds the device’s breakdown voltage, the device will start conducting, shorting the line’s current and thereby protecting the downstream devices and systems from the excess voltage or current. In addition to the current-limiting effect, MOVs can also provide transient voltage suppression, allowing the device to withstand short faults within a part of the line that is encountered during high-energy switching operations.

The main advantage of MOVs and the ROV14-820K-S-2 in particular is the way they can automatically limit current based on the applied voltage. This, along with the excellent EMC performance, makes them ideal for use in a variety of industrial environments. Furthermore, these devices can be mounted either on the PCB assembly or on the power supply itself. This allows for easier installation and provides added protection to the PCB assembly.

The ROV14-820K-S-2 is a versatile device that is suitable for a variety of applications and environments, offering reliable and robust protection against over-voltage transients and EMI/ESD. With its low capacitance, excellent high-frequency noise reduction, and robust performance over temperature and long time periods, this device is well suited for a broad range of industrial and consumer applications.

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