With these products, it is possible to connect to different styles of wall sockets (in other regions or countries) by changing the ac power cord to one with the appropriate wall plug configuration. Many products with ac power cords have a standard ac inlet at the product chassis into which the power cord is connected. Different ratings often employ physically different connector contacts such that mismatched plug and socket combinations cannot be engaged.įor desktop adapters, the ac connection is a cord, whereas a wall plug adapter will have an integrated plug. The maximum current rating for the connectors is also standardized. Since wall plug voltages are standardized, the ac power connectors are similarly rated to provide sufficient insulation for the standard voltages. Most countries have well-defined plug and socket combinations, voltages, and frequencies. Let’s explore common ac and dc input and output power connectors and how they are used.Īc wall plug selection is typically straightforward and comes down to two criteria: In what regions and/or countries is the power supply intended to be used, and does the application require two conductors or three conductors. Dc output connectors are much less standardized, and therefore only a commonly available subset of the connectors will be discussed. Single-phase ac-dc wall plugs and desktop power supplies with ac wall plugs (input) and dc power connectors (output) are standardized, as are the associated voltages and maximum currents thus, the discussion regarding those connectors is greatly simplified. Power supplies have both input and output voltages and thus often have associated input and output connectors.
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