Addtronics 420W dual fan power supply

Supports all ATX 2.01, ATX 2.03 & Intel P4 (12V) systems

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  •  420 Watts output.
  •  Dual Fan design. 
  •  Intel Pentium 4 Ready.
  •  High quality ball bearing fan.
  •  Automatic Fan Speed Control (A.F.C.).
  •  Built-in Quad Protection.
  •  Meet Energy Star requirement.
Specification | Connectors SummaryCable's Length


Intel Pentium 4 Ready.
Works with any Pentium III processor based system.
Works with any Celeron processor based system.
Recommended for AthlonTM XP systems.
Recommended for AthlonTM/Thunderbird systems.
Recommended for DuronTM systems.

420 Watts
maximum load
Load Range
Regulation Ripple
1. +5V 40.0A +5% ~ -5% 50 mV
2. +12V 18.0A +5% ~ -5% 120 mV
3. -5V 0.8A +10% ~ -10% 100 mV
4. -12V 0.3A +10% ~ -10% 120 mV
5. +5Vs 2.0A +5% ~ -5% 50 mV
6. +3.3V 30.0A +5% ~ -5% 50 mV
*+5V +3.3V combined output should not exceed 220W

MTBF Life Expectancy of this model:
100,000 hours* (11 years & 2 months)

Operating temperature range:
10oC - 50oC (50oF - 122oF)

Download Full Specification & Mechanical Drawing

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High standard of quality with FCC, UL, CSA, CE, TUV, SEMKO, NEMKO, FIMKO, DEMKO, and CB certification.


  • Automatic fan speed control (AFC) with built-in temperature sensor. The power supply fan speed is regulated in reference to its internal temperature sensor.  The low friction fan turns slowly at low temperatures, reducing power consumption and greatly reducing fan noise. Conversely, the fan is allowed to spin up its speed in response to temperature increase.  The fan speed ranges roughly from 1200 RPM to a full speed of 3000 RPM. 

    The AFC feature, in general, extends fan life, cuts down energy consumption, and reduce the chance of over-heating.   AFC is one step above the basic low friction "Noise Killer" fan deployment..

  • Fan Speed Monitor connector (3-pin) providing real time rotational speed of the power supply fan to the system.  Most motherboard has at least one extra 3-pin fan connector in addition to the standard CPU fan connector.Fan Speed Monitor connector does not have to be attached to the motherboard in order for the power supply fan or the AFC function to work.

    Some motherboards are not able to detect the RPM lower than 2000,When that is the case,it may show the RPM is "O".  

Connectors Summary

Connector NameQuantityPicture
20-pin Standard ATX connector1
Peripheral Power Connector9
4-pin ATX12V Power Connector1
Connector NameQuantityPicture
Floppy Drive Power Connector3
6-pin Aux Power Connector1
3-pin Fan Speed Monitor1

Cable's Length

1X 20-pin Standard ATX connector to fit any ATX mainboard.
3X Peripheral Power Connector.
1X Floppy Drive Power Connector.
3X Peripheral Power Connector.
1X Floppy Drive Power Connector.
3X Peripheral Power Connector.
1X Floppy Drive Power Connector.
1X 6-pin Aux Power Connector.
1X 4-pin ATX12V Power Connector.
1X 3-pin Fan Speed Monitor.