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Terminal Guidance

post #1 of 5
Thread Starter 
So I have been in the market for a good price on bulk Molex terminals and I've recently discovered that there are multiple types of plating. I have no idea what they mean or if they even make a difference. If I could get someones guidance or any suggestions as to exactly what part number I should go with it would be a huge help. I have the connectors drilled down to the following materials as well as a list from molex:


Tin (Sn) over Copper (Cu) Plated Brass - This is for the part number that was referenced in the Molex ATX Power Supply Connectors and Part Numbers thread here on OCN
Phosphor Bronze, Tin (Sn)
Selective Gold (Au) and Selective Tin (Sn) over Nickel (Ni)
Phosphor Bronze, Gold (Au)

Mind you I've found a place that will sell the first one for .044 a connector. Thanks in advance.
post #2 of 5
Tin over anything makes it easy to solder. If your soldering, chose a "tinned" connector. If your only crimping, then it doesn't matter.

Gold provides the best connection and resists corrosion.

Copper provides a good connection, but does not resist corrosion.

Phosper Bronze is tougher/stronger than copper or gold. It's isn't the best electrical connection in the world, but it won't break. Phosper bronze is often coated with another metal to make it conduct electricity better.

I think Nickel is the same idea as Phosper Bronze. It's strong, but doesn't conduct electricity well so it's often plated with something else.

Is the place you found called "digi-key.com" ? lol

Honestly, for generic computer work, it doesn't matter as long as you chose a "tinned" connector if your soldering.
Edited by crimsontears809739 - 3/19/12 at 10:05am
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post #3 of 5
Thread Starter 
Thank you very much, this was extremely insightful and helpful. As for the site, no, it was arrow? Something electronics. I can get the name and update this later if you like. Also, ill be crimping these to the wires, no solder. I guess I was just a little concerned because I've seen the pins on my Corsair AX850 and they looked gold. I wasn't sure if I should replace my broken ones with gold as well or if it even mattered.

Sent from my SPH-D700 using Tapatalk
post #4 of 5
Thread Starter 
Just updating as promised and for anyone else interested in the website. ArrowNAC
post #5 of 5
Digi-key, Mouser, Avnet, Arrow, Newark are probally the biggest electronics distributors.

Digi-key is kind of like the "wallmart" of electronics distributors because they have (usually) the biggest selection. They have 2.3 million items for sale. Mouser is probably the second biggest. Arrow's selection was always kind of "meh". If you have a part number from Arrow, you can enter it into the other sites and maybe find a better deal.

Should you replace the pins with gold? It's a "personal preference" thing. Gold will provide the best performance, but the other options will work as well.
Edited by crimsontears809739 - 3/23/12 at 10:14am
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