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Coolerguys 100-240v AC to 12 & 5v DC 4pin Molex 2A Power Adapter

4.6 out of 5 stars 152 customer reviews
| 28 answered questions
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  • Made exclusively for Coolerguys, 3 year replacement warranty
  • Input: 100-240VAC 50/60Hz 2A | Output: 12V +- 2A --- 5V+- 2A
  • Made to work specifically with any of the Coolerguys made thermal control units, 12v fans only
  • Includes: AC to DC Adapter and 5ft power cord, 4 Pin Molex cord is 48" from Power Adapter
  • Check out Thermal Control Units ASIN B002PNL0F4 & B0085EHCDQ (these require 12v fans, not compatible with our 5v lite kits)
Used & new (2) from $15.00 & FREE shipping on orders over $49.00. Details
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$15.00 & FREE Shipping on orders over $49. Details In Stock. Sold by Coolerguys and Fulfilled by Amazon. Gift-wrap available.

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Frequently Bought Together

  • Coolerguys 100-240v AC to 12 & 5v DC 4pin Molex 2A Power Adapter
  • +
  • Coolerguys Thermal Fan Controller (Rev. 4)
  • +
  • Cooler Master Sleeve Bearing 120mm Silent Fan for Computer Cases, CPU Coolers, and Radiators (Value 4-Pack)
Total price: $48.08
One of these items ships sooner than the other. Show details
Buy the selected items together

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Technical Details

  • Brand Name: OKGEAR
  • Model Number: 840556029977
  • Item Package Quantity: 1

Product Description


Coolerguys 100-240v AC to 12/5v DC adapter
We offer replacement warranty for 3 years
Great Adapter to Power your Entertainment Center Cooling or Lighting that runs on 12v. Standard 4 Pin Molex Connector.
Works internationally with AC power upto 240v if you adapt the plug. Comes stock with 2prong AC outlet plug

Made to work specifically with any of the Coolerguys made thermal control units (model #s 840556098690 & 840556090885) ASIN B002PNL0F4 & B0085EHCDQ the controllers however only work with 12v fans, the controllers will never work with our 5v lite kits
4 pin Molex Adapter with 48" Power Lead
5 ft - 2 prong - 110V Power Cord (in the UK you'll get a UK cord)
Model: Customized by Okgear Flypower SPP34-12.0/5.0-2000 exclusively for Coolerguys
Input: 100-240VAC 50/60Hz 1.5A
Output: 12V +- 2A / 5V+- 2A
Brick Dimensions: 114 x 47 x 32 mm
Cord Lenght: AC cord to brick 5ft, 4pin molex cord from brick 48"
UL - Listed

SGS CS Certified
ROHS.
retail packaged

Product Information

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Seller Warranty Description
3 year replacement

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Customer Questions & Answers
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Customer Reviews

Top Customer Reviews

2.0 out of 5 starsDoes Not Maintain Voltage under Load
By HVAC Guy on December 23, 2012
Verified Purchase
I bought this product based on the large number of 4-5 star reviews. A lot of these reviews say things similar to "does the job," "great for my purposes," and "exactly what I needed." While these opinions probably reflect actual circumstances, it does appear, taken as a whole, that many of the reviewers are comparing "hot unventiated boxes" to "putting in a fan(s) and using this supply." **OF COURSE** the box will run cooler!!!!!; but to me the question is, does this power supply deliver the specs, i.e. 12V @ 2A. My unit did not measure up.

My application involves running (3) 120 mm fans that require a total of 1.05 Amps at 12.0 volts (.35A per fan --see model R4-L2R-20AC-GP on Amazon). These fans need to operate 24/7 and move a specified amount of air at low SP. When I hooked things up, these fans were moving slow, slow . . . . slow. Then I measured the output voltage of the adapter under the 3-fan load and found the reason: 10.79V. This delayed my project and wasted my time.

Here is the voltage performance I measured with a Fluke 87 multimeter:

No Load: 12.41V
1 Fan: 11.63 V
3 Fans: 10.79 V

No wonder these fans were moving so slow and not moving the air I needed. My other power supply, maintained 12.52V under the 3-fan load (12.60V no load).

Pros: The molex connector is a nice feature and makes for easy fan hookup.

Cons: Either I got a bad unit or the unit has changed as suggested by another 2-star reviewer who downgraded his original review (the person running multiple cool cathode devices). If you expect to get near rated CFM from fan(s) you are running, this probably won't work for you; i.e.Read more ›
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2.0 out of 5 starsPoor voltage regulation (don't use for sensitive equipment)
By Craig Markwardt on July 30, 2013
Verified Purchase
I was excited about this power supply because it was inexpensive and provided both 12V and 5V outputs for my device. It saves me from getting two different power supply bricks. Unfortunately this power supply is not very robust. I would not use it for sensitive electronics.

The power supply is rated at 2 Amps for both the 5V output and 12V output. In my tests, it does not live up to either of those claims. According to the ATX standard, the tolerances on these should be +/- 5%. (i.e. 4.75-5.25V for 5V output and 11.4-12.6V for 12V output)

In my tests, the 5V output sags significantly under almost any load. At 0.65 Amp, or 33% of maximum claimed load, the voltage has already sagged to 4.75 Volts, the ATX limit. According to this, as long as you can keep your load under 0.65 Amp - 1/3rd of maximum - you can (barely) maintain ATX standard voltages. At 1.5 Amp, the highest load I could test at, and still within the claimed specs, the "5V" output was down at about 4.3 Volts! (14% sag)

The 12V output does not appear to be any better. I tested a load at 0.63 Amp, and the "12V" output was at 10.4 Volts! (13% voltage sag at 32% of maximum claimed load)

Finally, there is crosstalk between outputs. When I added 0.65 Amp load at 5V, the 12 V output voltage goes up to 12.6V. So if you have a transient load on one output, it can affect the other output, and can touch or exceed ATX limits.

My test results are not just one bad unit. I ordered two units separately and both had the same performance.

Given the apparent flaky performance, I wouldn't use these for sensitive electronics like hard drives that require well regulated power supplies. For 12V cooling fans, this power supply is probably OK, but the more fans you add, the more the voltage will sag and the slower your fans will turn.

This unit is branded "FlyPower", "OKGEAR" and "CoolerGuys"
1 Comment 18 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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2.0 out of 5 starsA revised review of why I am now giving this 2 stars instead of my previous 5 out of 5
By Xpendable on October 14, 2011
Verified Purchase
UPDATE 10/23/2013 - Still running on that first brick yet (and it's 2 years old now!!!!) I am writing up on this again (if you read the comments) that I may be exceeding the capacity of that brick...... apparently not, it's still kicking....

UPDATE 5/30/2012 - I must update and revise my review for this product. I recently bought another one of these adapters (late April), but they have changed them within the past year. They took away the ground wire and the molex wire also appears to be a little thicker (or the protective casing around the wires just may be thicker). Why did they change it, i will never know and this new adapter that I bought couldn't even handle 2 of my cold cathodes without the brick running hot. Also, the sound activation that these cathodes have would not even work properly when connected to this adapter.

My older adapter that I bought in October of 2011 works great and I have no complaints about it. Since this new adapter that I bought could not withstand or operate my cathodes properly, I am now forced to connect all of my cathodes up to my old adapter and guess what, THAT OLD ADAPTER SUPPORTS ALL 6 CATHODES AND THE BRICK RUNS COOL!

Here is what I wrote about the first adapter that I bought, but with the experience of this defective product, it is nullified:
""I bought this for wiring cathodes behind my monitors. Man, was it worth it! This little adapter certainly did its job with little ease. I have 4 Logisys 15" cold cathodes (sound activated) hooked up to this adapter and I know it most likely can do more.
The only problem I found is that it maybe could have a power switch on it (as many other people have stated too). But all in all, it is a sturdy and great product all around!""
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Most Recent Customer Reviews

5.0 out of 5 starsWorks!

Finally, a molex power adapter that works! I had to buy this when the one that came with my Sabrent usb/sata converter failed.

Published 3 days ago by Cole W.
5.0 out of 5 starsAquarium chiller

I used this to power my fans in my aquarium for keeping water at 78 degrees.

Published 1 month ago by Larry W.
5.0 out of 5 starsGreat way to power a fan to cool off an entertainment center

These wore great to connect to a computer case fan to provide quite ventilation / cooling to an area. I use this to cool the hutch area of my entertainment stand. Read more

Published 2 months ago by M. Daniel
5.0 out of 5 starsJust what I needed

I purchased two of these to use with a 6 port PC fan controller (NZXT Technologies Sentry Mix 2 Fan Controller) which required power from two Molex plugs for an entertainment... Read more

Published 2 months ago by Victor
4.0 out of 5 starsGood for DYI cooling projects

I use this to power a controller of 12V fans from coolerguys. Works as intended. No sure about efficiency of the device as it seems hot all the time

Published 2 months ago by A V
5.0 out of 5 starsGood

Work good

Published 2 months ago by Michael W. Smith
5.0 out of 5 starsI use this to power eight 160mm computer case fans that I've installed...

I use this to power eight 160mm computer case fans that I've installed in my entertainment center. Works perfectly.

Published 3 months ago by David Filmer
5.0 out of 5 starsFive Stars

A++++++

Published 3 months ago by Amazon Customer
5.0 out of 5 starsFive Stars

excellent quality

Published 3 months ago by HM
5.0 out of 5 starsDecent AC power alternative.

Paired with other MOLEX products for an electronics project, works as expected, no issues after extended use.

Published 4 months ago by Samuel Fisher

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