ROV05H121K-2

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TVS (transient voltage suppressor) Varistors, MOVs (metal oxide varistors) are two terms which often get interchanged. This means they are both solutions which protect against over voltage conditions. Varistors are basically two terminal semiconductor devices, these are used to protect against alternating overvoltages & surges. MOVs are two terminal devices, made up of a ceramic cover along with metal oxide elements inside. When these MOVs come into contact with a rising voltage, it will limit current flow.

ROV05H121K-2 is a type of varistor which is designed to respond quickly to overvoltage transients and is mainly used to protect low voltage power/signal lines of PCBs in base band modem applications. It is configured in a DO-213AA package, with a 4.5mm diameter, and a total height of 2.8mm. This component provides a RoHS compliant solution, which is compatible with 1.7KVAC transient voltage for a period of 10/1000µs.

The ROV 05H121K-2, varistor, has a maximum sustained clamping voltage of 455V with a maximum peak current value of 20A, and a maximum dissipation power of 299mW. The value of the leakage current for this device is 30µA maximum at any given time. The success of varistor can be attributed to its thermal dissipation properties, as well as high surge energy capability. The ROV 05H121K-2 has a capacitance rating of 21~41nf @33KHz, and the capacitance will not move due to changes in voltage and temperature.

The working principle behind ROV 05H121K-2 varistor is that it works by providing a low impedance path to ground when an overvoltage transient occurs on the signal or power line. The varistor will provide a resistance which is lower than the resistance between the signal line and the ground ensuring that any overvoltage is prevented and any damage to the system is prevented. The varistor is able to effectively clamp the line voltage, dissipating the energy as heat. This process is advantageous, as it allows for overvoltage peaks to be passed to ground relatively quickly, without the need for additional external protection mechanisms.

ROV 05H121K-2 varistor devices are ideal for applications in automotive systems, consumer electronics, medical equipment, LED lighting systems, and more. Not only do these devices provide superior overvoltage protection, but they also offer better durability, shock and vibration stability, low EMI, and thermal stability. The varistor is suitable for a wide range of temperatures and can operate up to 105°C. It is also designed to meet specific safety requirements established by international standards including UL, CUL, and CE.

In conclusion, ROV 05H121K-2 varistors provide excellent performance in overvoltage condition. These varistors can be used in many applications and are designed to meet safety requirements established by international standards. The varistor is designed with a low impedance path to ground which allows it to quickly dissipate overvoltage peaks, providing superior protection to the system. It provides excellent thermal dissipation capabilities, and is suitable for use in a wide range of temperatures.

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