Surge on-state current refers to the maximum current that passes through a device when it is in the 'on' state. In electronic circuits, this is an important parameter that determines the device's ability to handle overload conditions. There are a number of synonyms for this term that are commonly used in the electronics industry. Some of these include peak current, maximum current, pulse current, and peak inrush current. In addition to these common synonyms, there are also a number of technical terms that are used to describe surge on-state currents in specific contexts. Regardless of the name given to it, a surge on-state current is a critical parameter in electronic device design and selection.