ROV20H511K-2

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TVS - Varistors, MOVs are fast responding components commonly used to protect circuits from transient voltage spikes. ROV20H511K-2 is an application-specific TVS - Varistors, MOVs developed by Vishay for data line protection. It is used to protect high-speed data interfaces and communication lines.

Overview of ROV20H511K-2

ROV20H511K-2 is a bidirectional low capacitance transient voltage suppressor. It has peak pulse power handling capability of 3kW and peak Clamping Voltage (Vc) of 20V, 19V, 18V, 17V respectively. It is suitable for use in point-to-point, multipoint networks, and other balanced transmission lines. It is constructed with a silicon body material and it features a true differential mode and common mode protection. The product is RoHS compliant and halogen free.

Application Field of ROV20H511K-2

ROV20H511K-2 is designed to protect high-speed differential data lines requiring low capacitance and tight clamping. It is used to protect high-speed Fibre Channel, InfiniBand, Ethernet, and other differential data buses. It is used in point-to-point, multipoint or balanced transmission line configurations and is ideal for applications such as:

• Ethernet 10/100/1000-baseT
• Fibre Channel 8G, 16G, 32G
• InfiniBand QDR, DDR, SDR, 10GbE
• USB 2.0 (480 Mb/s), USB 3.0 (5 Gb/s)

Working Principle of ROV20H511K-2

The ROV20H511K-2 employs a balanced topology which prevents damaging currents from flowing between neighboring pins during overvoltage pulses. The device features a true differential and common mode protection and bidirectional operation which allow symmetrical voltage surge protection on both line directions. The ROV20H511K-2 also provides protection from electrostatic discharges (ESD) of up to +/- 15kV Human Body Model.

When the incoming overvoltage exceeds the standard threshold of an “on state”, the ROV20H511K-2 snaps to its lower resistance “off state” and limits the voltage spike to an absolute maximum, known as the Clamping Voltage (Vc). The voltage across the device is then passed on to a large low-impedance ground onto which the TVS is connected. The current is then contained to the short path created across the varistor and very little, if any, of the transient energy is passed on to the protected system or device.

The design of the ROV20H511K-2 allows it to rapidly respond to very fast overvoltage transients on the lines. Additionally, it is highly resistant to thermal/electrical fatigue and can withstand more than 1,000,000 surge cycles.

Conclusion

ROV20H511K-2 is a great example of how innovative semiconductor products can help protect modern high-speed buses and data lines from transient voltages. It is an ideal choice for protecting high-speed differential data lines in point-to-point, multipoint or balanced transmission line configurations. The device is compliant with RoHS and halogen-free standards, is highly reliable, and can survive more than 1,000,000 surge cycles.

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