PSU Versions
The three versions of PSUs for the original 360 consoles are the 203-watt, the 175-watt and the 150-watt. The new Xbox 360 S console has only one PSU, a 135-watt. To verify you have the correct PSU, compare the 12v output number on the PSU to the 12v output number printed by the power socket on the console. The number on the power supply must be equal to or higher than the number on the console.
Cord Ends and Voltages
The cord ends and voltages vary, depending on the country the consoles were manufactured for. Canada, Colombia and the United States all use 120 volts at 60 Hz, and Mexico uses 127 volts at 60 Hz. However, they all use the same type of cord end. Chile, on the other hand, has 220 volts at 50 Hz and utilizes a different cord end. Microsoft warns not to use PSUs outside the country where the power supply was sold. If you use the wrong PSU for the country you are in, you could damage the console and/or PSU and void your warranty. See Resource 1 for a complete list of voltages and cord ends for the different countries.
AC Power Cords and PSUs
AC power cords are available with two-hole ends and three-hole ends. Only use the two-hole ended cord in PSUs with two-prong sockets. Use three-hole cords for PSUs with three-prong sockets. Using the wrong AC power cord may damage the console or PSU.
DC Power Supply Cords
The direct current (DC) cord is permanently attached to the PSU. The end that plugs into the console's socket is keyed to fit only into compatible consoles. If it is the wrong PSU for the console, it won't fit into the socket. Refer to Section 1 to verify that your PSU is compatible with your console.