About Instrument and Computer (Disk Drive) Power Connectors
Instrument and computer (disk drive) power connectors are used to connect a computer’s power supply to a hard disk, floppy disk, compact disk (CD), digital video disk (DVD), or other type of disk drive. They are also used with removable media drives such as Zip disks, and computer cooling devices such as fans and electro-thermal coolers. Instrument and computer (disk drive) power connectors consist of a plastic housing and four wires that provide +5V and +12V power, along with two grounds, to each disk drive. There are two basic types of products: Molex and mini-plug. Molex connectors are keyed devices that attach to disk drives by friction. They are larger than mini-plug connectors and often use American Wire Gauge (AWG) 16 to 18 wires. Mini-plug connectors are designed to fit into a retention clip on the disk drive. Products that are used with floppies and other disc drives that draw little current use AWG 18 to AWG 22 wire.
Engineering Web: Instrument and Computer Disk Drive Power Connectors - Machine Design
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