Power Supply A Guide to 12V PSU

syin16

Efficiency Noob
Aug 10, 2019
7
0
You more or less answered your own question: the voltage has to be considered when looking at those ratings. As we know: Watt = Voltage x Current

So if it is rated for 5A we get...

  • 5A x 110VAC = 550W (used on the AC side, if you live in the US)

  • 5A x 12VDC = 60W (used on the DC side)

In other words: using some connector like that for AC input would work but not for the DC output. If you need a connector that can handle 12VDC / 50A I would have a look for something like the AMASS XT90.

Also note that many of those aviation connectors selling on eBay, Amazon, etc are crap. I would try to get connectors always from electronics distributors like RS, Mouser, etc.
Based on this, i live in Malaysia where the operating voltage is 240V and 50Hz. Based on the specs of the GX12-3 connector, maximum current of 5A and operating Vrms of 250V, so the max power is 5A x 240VAC = 1200W (malaysia). Technically the connector can handle that can of power right? Because i'm planning to order g-stick fm @guryhwa for power rated of 600W. Wonder if the connector he used will be sufficient? Try asking him about all this questions but seems like he's a busy guy
 

REVOCCASES

SFF Guru
Bronze Supporter
Apr 2, 2020
1,103
989
www.revoccases.com
Based on this, i live in Malaysia where the operating voltage is 240V and 50Hz. Based on the specs of the GX12-3 connector, maximum current of 5A and operating Vrms of 250V, so the max power is 5A x 240VAC = 1200W (malaysia). Technically the connector can handle that can of power right? Because i'm planning to order g-stick fm @guryhwa for power rated of 600W. Wonder if the connector he used will be sufficient? Try asking him about all this questions but seems like he's a busy guy

Gury has quite some experience and knowledge about that stuff. Certainly more than we all together. 😅 I am sure he will use connectors suitable for his products when you order a complete set from him.
 

BaK

Master of Cramming
Bronze Supporter
May 17, 2016
550
497
In general I would recommend to always stay within ratings given by the manufacturer.

My personal experience is: I had (no-name / generic) connectors failing way below their claimed ratings but I also had connectors which would work just fine at almost double of their official ratings. Sometimes it depends on the quality and if the manufacturer considered safety margins. Luckily I have access to HiPot and Load Testing equipment so I can check connectors before using them.

The two product pages you linked look pretty similar to me. Maybe one of those are better insulated. Or there could just be an error in one of the descriptions. Not sure.

As @Valantar pointed out, the solder terminals look pretty close to each other. For higher voltage applications where safe creepage distance cannot be maintained there should be some separators in between. If there there is not enough space for separators, @Valantar 's idea of using epoxy is also sometimes used.

I have no experience with CnLinko products so it would be a wild guess to say it's safe to use. If in doubt, I would always ask the supplier / manufacturer if it's safe to use for your application. Or just go with a connector from a well known brand where you can be sure that ratings match with your application.

I asked two electrician friends here.
First one agreed with my calculation and said I will be good, but only until I showed him the connector for real and he realized how small it is.
He then changed his mind telling me the pins are indeed small and close to each others for a 250V usage.

Second one was embarrassed to give me an clear answer, he ended up asking me if I always will be around when the computer will be running. Which I think says all...

That's why I sent a message to CnLinko, I will report here what they say if/when they answer.

But I guess I will have to switch to a more common C6 socket :\
 

Curiosity

SFF>Speed
Silver Supporter
Apr 30, 2016
618
662
All I can say to the credit of XT/MR/MT connectors is that gury uses them in a few/ several of his power supply units and cases seemingly with no issue.
You're right though, I'm pretty sure those connectors I mentioned are generally designed for use with batteries for RC and other hobby electronics.

Maybe I should find a different connector for my power inlet though, i chose the MR30 because of it's small size, at the time thinking I had almost no space to fit a power inlet. Case revisions have left me with more empty or at least potentially empty space than when I made that decision almost a year ago (D:)