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ATX power supply connector

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v 1.x with 20 pin connector was widely used at PC motherboard. Replaced by v 2.x with 24 pin connector

ðàçúåì 20 pin MOLEX 39-29-9202

20 pin MOLEX 39-29-9202 connector
at the motherboard



ATX specification includes not only Power Supply Unit, but also case and motherboard. In addition to old AT standard, one extra voltage line is available(+3.3V), connector changed to a single 20-pin and power supply uses a power-on wire, allowing PSU to be turned off by software.

Pin Name Color Description
13.3V Orange+3.3 VDC
23.3V Orange+3.3 VDC
3COM BlackGround
45V Red+5 VDC
5COM BlackGround
65V Red+5 VDC
7COM BlackGround
8PWR_OK GrayPower Ok (is a status signal generated by the power supply to notify the computer that the DC operating voltages are within the ranges required for proper computer operation)
95VSB Purple+5 VDC Standby Voltage (max 10mA)
1012V Yellow+12 VDC
113.3V Orange+3.3 VDC
12-12V Blue-12 VDC
13COM BlackGround
14/PS_ON GreenPower Supply On (active low). Short this pin to GND to switch power supply ON, disconnect from GND to switch OFF.
15COM BlackGround
16COM BlackGround
17COM BlackGround
18-5V White-5 VDC
195V Red+5 VDC
205V Red+5 VDC
/PSON activated by pressing and releasing the power button while the power supply is in standby mode. Activating /PSON connects the power supply�s /PSON input to ground, thereby switching the power supply to full-on condition.

18 AWG is recommended for all wires except pin 11, which should be 22 AWG. For 300W configurations 16 AWG is recommended.
There are several ATX variants.

20 pin MOLEX 39-01-2200

20 pin MOLEX 39-01-2200 connector
at the cable

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Pinouts.ru > ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ - ������� ������� ������� >  ���������� ATX power supply connector ������������� ������ 20 pin MOLEX 39-29-9202 � ������ 20 pin MOLEX 39-01-2200
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��������(�) � �������������� ����������: ATX Spec v2.03 at Platform Development Support, from Hardware Book 22 �������
Last updated at Fri Sep 15 2006 (�������� ��� ����� ��� ������ ����������)
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