ROV10-221K-S

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Transient Voltage Surge Suppressors (TVS) are used to protect electronic components from high voltage and current spikes, thus protecting the device from possible short-circuiting. Varistors, Metal Oxide Varistor (MOVs) and Silicon Avalanche Diodes (SADs) are three common types of TVS devices. The ROV10-221K-S is a type of MOVvaristors from the Raychem family.

The ROV10-221K-S is a radial leaded thermal MOVvaristor featuring double side terminals. These terminals allow for better gas dissipation to an external heatsink and for shorter FIT rates, making it suitable for use in high-energy installations such as those seen in high power electronic equipment. It has a low capacitance which offers excellent protection against high frequency transients and has a unique clamping configuration which offers a high holding voltage to prevent over-voltage, making it suitable for applications such as high power switching supplies.

The ROV10-221K-S has a high peak per-line surge current capability of 69.2 kA/1000V impulse Current, making it suitable for high voltage and electrical surge applications. It also offers excellent stable voltage levels across the range at normal temperature ranges, with a rated voltage of 275VAC and a Maximum Continuous Operating Voltage (MCOV) of 321VAC

The working principle of the ROV10-221K-S is based on the principle of a Thermal Switching Varistor or T-Svaristor. The T-Svaristor is a two-stage VDR that acts as a switch between two electrical resistive states. In the first-stage, the T-Svaristor functions as a thermistor, by regulating the voltage, current, and temperature levels across the device. This leads to a stable power delivery to the load. The second-stage, allows for the device to act as a fast-switching protective device, in the event of an over-voltage spike, it rapidly switches to a high resistance state, which serves to protect the device.

In addition to its main application field, the ROV10-221K-S is also used in a wide range of other applications, such as high power UPS systems, medical imaging equipment, industrial power supplies, automotive equipment, and other critical electronic applications. Its high per-line spike current and higher surge ratings make it ideally suited for these applications.

In conclusion, the ROV10-221K-S is a thermal MOVvaristor from the Raychem family, which is used in applications such as high power switching supplies. It has a high peak per-line surge current capability of 69.2 kA/1000V impulse current, and excellent stable voltage levels across the range at normal temperature ranges, with a rated voltage of 275VAC and a Maximum Continuous Operating Voltage (MCOV) of 321VAC. Its two-stage VDR principle makes it ideal for protection against over-voltage spikes in a variety of critical electronic applications.

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