Your 0.33 A may consume 0.5A - 0.75A for a few seconds, until it get up to some decent speed. When they're completely stopped and you try to start them, they'll consume much more power for a brief period of time, let's say 2-5 seconds. Therefore you limitation will be the wires (at least 10A of current), and the contacts / pins in the connector on the power supply (9A or more, depending on pin/contact type)Īs for fans, fans are motors. If your power supply is modular and there's a connector on the power supply, that's your limitation.įor the whole chain of connectors (either molex or sata or a mix of sata and molex), there's a single wire for each voltage going to the connector on the power supply, and there's a single contact / pin in the connector on the power supply for each voltage. The choke point is the connector going into the power supply, not the individual connectors on the chain. You can't connect 4 led strips each consuming 4A to a chain of 4 SATA connectors, because altogether they'll consume 4 x 4A = 16A of current, and the wire and the connector on the power supply can not handle that. You still have to account for total current. Basically, I would not use such molded connectors for more than 3A of current on each voltage. If the connectors are MOLDED (wires are spot welded or soldered to pins and then the plastic housing is injected molded over the pins/contacts making the wired impossible to take out manually), those have bigger "play" and worse contact when they mate, and there's a big chance of higher contact resistance which can result in overheated connectors, and the injection molded plastic is more sensitive to heat and weakens easier. If the connectors are of the CRIMPED variety (where the individual wires are crimped to the metal contacts and can be removed from the housing manually) then it would be safe to rate them for 4.5A - I would not use them for more than 4A of current on each voltage. HOWEVER - it's one thing the standard, and another thing the quality of construction of SATA connectors. PN# 39-01-2240 or equivalent" - another, different, "Molex" power connector.Each SATA connector is rated for maximum 4.5A on each voltage - there's 3 contacts inside the SATA connector, each rated for 1.5A Note also that the main 24-pin power connector (§ 4.2.1) is specified as "Molex* Housing: 24 Pin Molex Mini-Fit Jr. ![]() Note that AMP and Molex are two different manufacturers, and those are just part numbers. The ATX power supply specification actually refers (§ 4.2.2) to them as a " peripheral connector", specified as "AMP* 1-480424-0 or Molex* 15-24-4048 or equivalent". Your first pictured connector is actually a PATA/IDE ribbon data cable. Despite the different names, they are the same thing. Therefore, a power connector referred to as a "PATA" or "IDE" power connector is likely to be a "Molex 4-pin power connector" or "peripheral power connector" and looks like your latter pictures. It was most commonly used with pre-SATA hard drives, which are nowadays referred to as PATA (previously called IDE) drives. ![]() The 4-pin power connector that is commonly called a "Molex connector" is really more a general purpose peripheral power connector that delivers 12 V and 5 V power. Including the main 24-pin ATX motherboard power connector! And companies other than Molex also make the connector you know as a "Molex connector", notably AMP but also many unbranded/generic ones are also available. ![]() "Molex connector" is actually a rather imprecise term, since the Molex company makes many, many different connectors.
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