ROV10H121K-2 Circuit Protection

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TVS (Transient Voltage Suppressor) devices are one of the most important components in electronics systems, and they are used to protect the system from receiving excessive voltage. ROV10H121K-2 is one of the most commonly used devices for such applications. In this article, the application field and working principle of the ROV10H121K-2 will be discussed in detail.

The ROV10H121K-2 is a metal oxide varistor (MOV) that is used to protect circuitry, typically in AC-DC power supplies and switch-mode power supplies, from over-voltage transients and surges. The device consists of sintered ZnO discs which are connected in parallel and encased in an epoxy package. The sintered ZnO discs provide lower contact resistance and a wide range of surge currents.

The ROV10H121K-2 has an operating voltage of 121 volts and a breakdown voltage of 210 volts. The device has a large effective capacitance of 5 nF and a response time of less than 10 ns. In addition, the device has a wide frequency range, from 1 kHz to 100 MHz. It has excellent surge current tolerance and a low clamping voltage that offers more efficient protection.

The ROV10H121K-2 is widely used in AC-DC power supplies and switch-mode power supplies. It is also used to protect communication systems, like telecommunication lines, from over-voltage transients. In addition, the device can be used in automotive and home appliance applications for protection against short-term over-voltage transients. The device is also suitable for use in medical systems, military equipment, and industrial machinery.

The working principle of the ROV10H121K-2 is based on a non-linear relationship between the voltage and current of the device. When a voltage is applied to the device, the current passing through it is proportional to the applied voltage. When a transient or surge voltage is applied, the current increases exponentially and the device acts as a shunt element, providing an over-voltage protection to connected circuits.

When a transient or surge voltage is applied, the voltage across the device increases exponentially due to the non-linear relationship between the voltage and current. This increases the current through the device and causes it to clamp the transient voltage. The device also has a “memory” property, which allows it to instantly respond and shut down the power line whenever a high surge voltage is detected.

The ROV10H121K-2 is a robust and reliable device that offers superior protection against over-voltage transients. It has a wide operating voltage range and a fast response time which makes it an ideal choice for many different applications. The device is cost-effective and easy to install, making it a popular choice among many designers.

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