ACSeite

ACSeite is a term used in electrical engineering, especially in German-speaking contexts, to describe the portion of a device or circuit that is connected to alternating current (AC). The counterpart is the DC-Seite, referring to the direct-current side, usually after rectification or conversion. In schematic diagrams, the ACSeite is typically labeled with AC symbols (such as ~) and denotes the input section of a power supply or similar equipment.

In practice, the ACSeite includes components and circuits involved with acquiring the mains supply or other AC sources, such as a mains connector, protective devices, line filters, surge protection, and sometimes the initial rectifier stage. Downstream from this boundary, the DC-Seite handles rectification, smoothing, regulation, and the power rails used by internal circuits.

Design and safety considerations are prominent for the ACSeite. Designers must ensure electrical isolation where required, maintain adequate creepage and clearance distances, and comply with safety standards. Protective earth connections and appropriate enclosures help reduce shock and leakage risks.

The boundary between ACSeite and DC-Seite varies by design. In some layouts the rectifier marks the division, while in others the boundary is defined by a switching stage or transformer.

See also: DC-Seite, power supply, rectifier, isolating transformer.

References: standard texts on power electronics and electrical safety.