The FUJI ELECTRIC SZ-B1 is a high-performance surge suppressor designed to protect electronic controllers from motor surge voltages. Featuring a built-in surge absorbing varistor and CR circuit, this unit ensures reliable operation by preventing miss-operation due to inductive load switching and external circuit surges. Ideal for use with Fuji Electric contactors, the SZ-B1 is an essential component for maintaining the integrity of your industrial automation systems.