SATA power connector pinout diagram @ pinoutguide.com

15 pin Molex 67581-0000 SATA power connector

Serial ATA specifies a fifteen-pin power connector. Slimline connector with six pins is used for some small form-factor applications.

Molex 67581-0000 used for cable connector and Molex 67582-0000 used for terminals connector.

The SATA standard specifies a power connector sharply differing from those used by PATA drives and many other computer components. It is wafer-based, 15-pin shape. The seemingly large number of pins are used to supply three different voltages — 3.3 V, 5 V, and 12 V.

Each voltage is supplied by three pins ganged together (and 5 pins for ground). This is because the small pins cannot supply sufficient current for some devices. One pin from each of the three voltages is also used for hotplugging. The same physical connections are used on 3.5-inch and 2.5-inch notebook hard disks.

Pin	Signal	Description	PSU Color Wire
1	+3.3VDC	3.3 V Power	orange
2	+3.3VDC	3.3 V Power	orange
3	+3.3VDC	Enter/exit Power Disable (PWDIS) mode (3.3 V Power, Pre-charge prior to SATA 3.3)	orange
4	GND	Ground	black
5	GND	Ground	black
6	GND	Ground	black
7	+5VDC	5 V Power, Pre-charge	red
8	+5VDC	5 V Power	red
9	+5VDC	5 V Power	red
10	GND	Ground	black
11	Optional	Staggered spinup/activity	black
12	GND	Ground	black
13	+12VDC	12 V Power, Pre-charge	yellow
14	+12VDC	12 V Power	yellow
15	+12VDC	12 V Power	yellow

Pins 3,7,13 are pre-charge.

Pin 11 can be used for activity indication and/or staggered spin-up. If pulled down at the connector (as it is on most cable-style SATA power connectors), the drive spins up as soon as power is applied.

Pins 1, 2, and 3 are optional as well, as evidenced by some adapter cables that connect the drives to older PSUs. These are usually Y-adapters that have the four-pin drive connector on the other end. Currently, SATA drives rarely use 3.3 volts. That may be because there are too many people using adapters so the drive makers don't want the headaches which come with using 3.3 volts. But in the future, 3.3 volt drives may become common so you need to be careful when using SATA power cables which don't implement 3.3 volts.