MLV (Multilayer Varistor), SMD transient voltage suppressor, also known as zinc oxide varistor or “surge absorbers”, is a kind of voltage and current-voltage properties of symmetric properties resistors. MLV is semiconducting ceramics (zinc oxide) for materials through lamination technology (multi-layer) manufacturing, with excellent instantaneous energy absorption capacity, as well as fast internal thermal fugitive character, to achieve the effect of protection circuit, also known as multilayer varistor.