Power comes across 8 pins (4 Vbus, 4 Ground) From the spec: "3.7.7.4 Contact Current Rating (EIA 364-70, Method 2) A current of 5.0 A shall be applied collecti

Power comes across 8 pins (4 Vbus, 4 Ground) From the spec: "3.7.7.4 Contact Current Rating (EIA 364-70, Method 2) A current of 5.0 A shall be applied collectively to VBUS pins (i.e., pins A4, A9, B4, and B9) and 1.25 A applied to the VCONN pin (i.e., B5 of the plug connector) with the return path through the corresponding GND pins (i.e., pins A1, A12, B1, and B12). A minimum current of 0.25 A shall also be applied individually to all the other contacts. When the currents are applied to the contacts, the temperature rise shall not exceed 30 °C at any point on the USB Type-C mated plug and receptacle under test, when measured at an ambient temperature of 25 °C." http://www.usb.org/developers/docs/ http://www.usb.org/developers/docs/