ROV07H471K-S-2

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TVS - Varistors, MOVs are like lightning arrester devices that protect circuit designs from high surge voltages that are above the normal operational voltage. ROV07H471K-S-2 is a three-lead component which makes use of a silicon oxide varistor as its element.

Component Selection

ROV07H471K-S-2 Voltage Dependent Resistors (VDR) from Cerrbest is a three-lead component which makes use of a silicon oxide varistor as its element. It has a high surge voltage on the 8/20 μs pulse for low impedances. It also has a resistive inline current, low capacitance, and a very fast response time. Additionally, it has UL Approved File Number E51016, per UL 1414 and CSA C22.2#235.

Application Field

ROV07H471K-S-2 can be used in a wide array of situations and has a surge absorption of 19A and holds a tight +/-10% tolerance even at full load. This surge current rating makes it suitable for use in powering devices, surge protection circuits, high-voltage motor controls, and as an overload protection device for high impedance circuits. It can also be used for SMPS applications, power supplies, industrial machinery, and other consumer electronic products.

Working Principle

The ROV07H471K-S-2 works by creating a small resistance when the voltage exceeds its surge threshold. This resistance reduces the voltage across the device, which prevents it from getting damaged. This is because the device acts as a voltage suppressor by providing a path for the surge current to be redirected away from sensitive electronic components. The device is also designed to have low capacitance and fast response time, allowing it to protect the circuit from voltage spikes in a timely manner.

The device is constructed using a varistor element which consists of an oxide layer between two electrodes. When a surge voltage is applied, the oxide layer breaks down and forms a conductive path between the two electrodes. This creates a resistance which is inversely proportional to the current flowing through the device. As the current increases, the resistance decreases and vice versa. The ROV07H471K-S-2 can handle a maximum of 19A surge current, meaning it can protect electronics from high surge voltages up to 19A.

Conclusion

ROV07H471K-S-2 Voltage Dependent Resistors are an excellent choice when it comes to fast response times and low capacitance. They are an important component in protecting electrical circuits from high surge voltages and are suitable for use in a wide range of applications. The device works by creating a small resistance when the voltage exceeds its surge threshold, which reduces the voltage across the device and prevents it from getting damaged. With its high surge rating and tight tolerance at full load, the ROV07H471K-S-2 is a great choice for surge protection.

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