The ABCs of Littelfuse Multilayer Suppressors

This guide is similar to "The ABCs of MOVs", offering specific information on Multilayer suppressor device technology and is intended to be a supplement to the Littelfuse Multilayer data sheets. As with MOVs, Littelfuse Multilayer Suppressors protect a broad range of applications and circuit components. They are offered in different designs to accommodate different suppression requirements. For an initial determination of which type is suitable, it is desirable to know: 1. The working voltage or maximum system voltage. 2. The type of transient that is to be suppressed and its energy level. 3. What circuit or component requires protection and, therefore, to what level must the transient be suppressed. Multilayer Suppressors are most often applied to low voltage (<50VDC) systems on power supply, signal, or control lines in order to suppress ESD, EFT, Surge, or other transients at the circuit board level for component protection. Additionally, these devices may be applied to products subjected to immunity testing such as the EN61000 (IEC) standards in order to achieve specific electromagnetic compatibility (EMC) ratings.