ROV20H621K-S

A varistor is a voltage-dependent passive element with a potentially large current-handling capacity. Varistors, also known as voltage-dependent resistors (VDRs), or metal-oxide varistors (MOVs), normally have a high resistance at low voltages, but when the voltage reaches certain levels, the resistance decreases drastically. This sudden transition of resistance has many applications, such as overvoltage protection and current limiting. The ROV20H621K-S is a type of varistor designed specifically for applications requirint high energy absorption capabilities.

Working Principle

The ROV20H621K-S is a zinc oxide varistor made up of two plates that are separated by a dielectric composition. When the voltage across the plates reaches a certain threshold, the dielectric material breaks down, allowing an increase in current flow through the circuit. This sudden increase in current causes the resistance to drop off drastically, allowing for high energy absorption capabilities.

Application Field

The ROV20H621K-S is widely used in a variety of electronic applications, such as overvoltage protection and current limiting. The varistor can be used to protect sensitive components from voltage transients, such as those caused by power outages or sudden changes in voltage. This can help prevent the damage of computer systems or other sensitive electronic components. The ROV20H621K-S can also be used as a current limiter, helping to prevent the overcurrent faults that are common in electronic circuits.

Overall, the ROV20H621K-S is a useful and efficient device for a variety of applications, especially those requiring high energy absorption capabilities. Its fast response time and low level of losses make it well suited for overvoltage protection and current limiting.