ROV07-391K-S

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Varistors, or voltage dependent resistors, are a type of static electricity protection device that are used to provide protection against transients, surges, and over voltages. The ROV07-391K-S is a varistor that is used in a variety of applications, including overvoltage protection, transient suppression, and control circuit noise reduction. It is a non-linear device, meaning that its resistance changes depending on the applied voltage. This article will discuss the application field and working principle of the ROV07-391K-S.

The ROV07-391K-S is most commonly used in industrial, telecom, automotive, and computer applications. In industrial applications, the device is used for overvoltage protection, typically in conjunction with fuse or circuit breaker systems. In telecom applications, it is used to suppress transient spikes, as well as to protect against overvoltage and cross-talk. Automotive applications include surge protection for electronic components, such as power doors and windows, as well as noise reduction in ECUs (Engine Control Units). In computers, the device is used for EMI suppression, as well as to prevent system shutdowns due to input voltage spikes.

The ROV07-391K-S is a silicon-based non-linear device, meaning that its resistance changes depending on the applied voltage. It has a positive temperature coefficient, meaning the resistance increases as the temperature increases. This makes it ideal for applications that require temperature compensation in order to protect the device from overvoltage and transient spikes. When the applied voltage exceeds the threshold voltage of the device, the resistance decreases, allowing current to pass through the circuit. The reverse happens when the applied voltage falls below the threshold voltage - the resistance increases and the current is blocked. This helps to protect the circuit from damaging transient or over voltage events.

The ROV07-391K-S is a reliable and robust device with a long life expectancy. It is designed to withstand up to 1,400V of overvoltage and up to 160V of transient spikes. It has a clamping voltage of 9V, a tolerance of ±5%, and a maximum leakage current of 5µA. It is rated for operating temperatures ranging from -40°C to +85°C, making it suitable for use in a wide range of applications.

In summary, the ROV07-391K-S is a reliable and robust device designed to provide protection against transients, surges, and over voltages in a wide variety of applications. Its non-linear design and robust construction make it ideal for industrial, telecom, automotive, and computer applications, where reliable protection is essential. Its wide operating temperature range, low maximum leakage current, and high level of tolerance ensure consistent, reliable performance.

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