TVS - Varistors, MOVs

Circuit Protection-TVS (Transient Voltage Suppression) devices, such as Varistors and Metal Oxide Varistors (MOVs), are essential components used to protect electronic circuits from voltage surges and transients. Varistors and MOVs are designed to provide a low impedance path for excessive voltage spikes, diverting them away from sensitive components and preventing damage. They are commonly used in applications where there is a risk of voltage fluctuations, such as power supplies, telecommunications equipment, automotive electronics, and industrial machinery. Varistors are made of a ceramic material with a non-linear voltage-current characteristic. When the voltage across the varistor exceeds its threshold, it rapidly changes its resistance, effectively clamping the voltage to a safe level. This allows varistors to absorb and dissipate high-energy transients, protecting the circuitry downstream. MOVs, on the other hand, are a type of varistor that utilizes a metal oxide material. They offer similar protection capabilities as varistors but with improved performance and reliability. MOVs have a higher energy absorption capacity and faster response time, making them suitable for applications with higher surge currents. Both varistors and MOVs are available in a range of voltage ratings, sizes, and package types to accommodate different circuit requirements. They are typically connected in parallel with the circuit being protected, ensuring that any excessive voltage is diverted away from sensitive components. In summary, Circuit Protection-TVS devices, such as Varistors and MOVs, play a crucial role in safeguarding electronic circuits from voltage surges and transients. Their ability to absorb and dissipate high-energy spikes helps prevent damage to sensitive components, ensuring the reliable operation of electronic systems.