When selling electric sliding doors on Alibaba.com, one of the most critical specifications buyers will ask about is voltage compatibility. The power source configuration—whether 220V single-phase or 380V three-phase—directly impacts which markets your products can serve, installation complexity, and ultimately, your competitiveness as an alibaba.com supplier.
What Do 220V and 380V Actually Mean?
In industrial and commercial door applications, voltage refers to the electrical power supply required to operate the motor. Single-phase 220V (or 230V/240V depending on regional standards) is typically used for lighter-duty applications—doors weighing up to 500-800kg. Three-phase 380V (or 400V/415V) is designed for heavy industrial doors exceeding 1000kg, providing more consistent power delivery and better motor efficiency for continuous operation [5].
Why Voltage Matters for Export
Unlike consumer electronics that often include universal power adapters, industrial door motors are typically hardwired to match local grid standards. A motor designed for 380V three-phase power cannot simply be plugged into a 220V single-phase outlet—it requires a transformer or complete motor replacement. This makes pre-shipment voltage confirmation critical for alibaba b2b transactions, as incorrect voltage specification leads to installation failures, returns, and damaged buyer relationships.

