ROV14-271K-S

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Transient voltage suppressors (TVS) are protective devices designed to protect circuits from overvoltage transients or voltage spikes produced by electrical insulation failure, lightning and other power surges. Varistors and Metal Oxide Varistors (MOVs) are the most commonly used TVS devices. Common applications are for circuit boards, telecommunications and industrial process control systems. This article explains the application field and working principle of ROV14-271K-S, a TVS-Varistor.

Varistors are non-linear, voltage-dependent resistors that provide protection from transient voltage spikes. ROV14-271K-S is a 14-Volt, wide band gap, television suppressor-varistor with a maximum reverse stand-off voltage of 371 Volts (VDC). It is designed to provide reliable, high speed, low capacitance and low thermal resistance protection for sensitive electronic components. It has a peak current handling capacity of 400 Amps (Ipp) and can divert up to 20,000 Amps of peak energy (Epp). The flame retardant epoxy body is UL approved, making it suitable for a wide range of applications and environments.

ROV14-271K-S contains two metal layers: an substratum electro-conductive layer and a deposited metal oxide semiconductor layer. The electro-conductive layer is comprised of two interconnecting copper electrode structures on both sides of the diode. Deposited onto the substratum is a zinc oxide semiconductor layer in which a high concentration of ions is contained. This semiconductor layer creates the voltage dependent characteristic of the varistor.

When the applied voltage is below the breakdown voltage of the varistor, no conduction takes place and the varistor behaves like an open circuit. When the applied voltage reaches the varistor\'s breakdown voltage VB, the conduction takes place. This increases the varistor\'s conductivity by several orders of magnitude. This increase in conductivity causes the collapse of the voltage across the device and the energy is dissipated as heat, thus providing protection from transient overvoltages.

ROV14-271K-S is a two-pin varistor which can be used to provide ESD, lightning and power surge protection. It is widely used in applications such as power supplies, telecommunications, consumer electronics, automotive electronics, medical equipment and industrial instrumentation. ROV14-271K-S is also suitable for use in applications where radio frequency interference (RFI) or electromagnetic interference (EMI) protection is required. In addition, ROV14-271K-S is temperature compensated over a range of -40°C to +85°C and has proven to be highly reliable in harsh environmental conditions.

ROV14-271K-S is a very effective solution for transient voltage spike events, such as those caused by lightning strikes and power surges. The diode layer is designed to quickly respond to the voltage surge, dissipating the excess energy as heat. This provides excellent protection from overvoltage transients, without causing any damage to the protected components.

In summary, ROV14-271K-S is a robust and reliable transient voltage surge suppressor-varistor suitable for numerous applications. It provides reliable protection up to 371 VDC peak and to 20,000 Amps of peak energy. Its flame retardant epoxy body is UL approved and it is temperature compensated over a wide range. ROV14-271K-S is an excellent solution for providing ESD, lightning and power surge protection and is highly effective at dissipating transient voltage spikes.

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