brief introduction: Diode Arrays: Diode arrays belong to the broader category of silicon protected arrays (SPAs) designed to provide ESD protection.Commonly found in small surface mounts (SOIC-8, SOT-23, SC-70, etc.), the transient suppressant diode consists of a special P-N semiconductor junction that provides surge protection.PN junction is usually coated to prevent premature voltage arc flash in the non-conductive state.When a transient voltage occurs, the transient suppressant diode starts conducting and clamps