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6 pin IDC male connector layout
6 pin IDC male connector
Late model Apple laptops, iMacs and Mac Pros have analog speed control fans. This pinout and color scheme applies to fans made by Delta Electronics, models BFB0412HB (Apple P/N 603-5520), BFB0612H (Apple P/N 603-5519), BFB0812H (Apple P/N 603-6624), and others.

The fan connectors are 6 pins (2x3 0.1 inch IDC style), but the fan connectors have pin 1 marked.  When looking end on at the female fan cable connector, pin 1 is either in the lower left or upper right, with a corresponding reversed motherboard male connector. 

Description Wire Color
1   Fan Speed Control

  0-5 volts analog fan speed control.

  0 volts=off, 5 volts = 100%, 2.5 volts = 50%, ...

  Can also be controlled using a 5 volt PWM signal.

2   Key   No connect  
3   Key   No connect  
4   +12v   +12 volts   Black with gray stripe
5   GND   Ground   Black
6   SIGNAL   Fan RPM   Gray


According to 1 reports in our database (1 positive and 0 negative) the Apple Fan Connector (6 pin) pinout should be correct.

Is this pinout
Apple Fan Connector (6 pin) visual pinout:click to enlarge
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