There are two – Wattage and Market.
Wall adapter and desktop power supplies are usually certified for a specific voltage and current range, but have a max potential wattage output. This max wattage is found in the model number of most power supplies (example HDP40 = 40W max) and has a direct impact on cost. The higher the wattage, the higher the cost. This makes it important for you to find a model that meets your electrical requirements, but is not too much power for the application.
There are many different AC wall inlets across the world and therefore many different wall adapters and desktop AC cords to suit those inlets. It's important to consider whether you will be selling your product in multiple markets with different AC inlets or a single market with a single inlet. You may need an interchangeable wall adapter if you plan to sell across multiple markets. Furthermore, each market carries different safety, emissions, and efficiency certifications to maintain compliance. Be sure to verify with your HDP representative that your power supply meets these requirements.
