Question What is the Max voltage and Amperage of the a Dell 7.4mm x5mm barrel connector male?

[reaper89971]

Wondering what the max voltage and amperage is on a Dell 7.4mm barrel connector male? Wondering if i can run 27 volts at 18.50 amps through it.

https://www.ebay.com/itm/185369398278

 

[reaper89971]

HDPLEX HIFI DC-ATX 500 watt has a 8 pin female barrel connector as the input plug. It is a custom large barrel connector i think.

I was going to connect the barrel connector male to a LOP-500-27. The LOP-500-27 has screw in output plugs not sure what there called but you just screw the wires down really simple no soldering.

 

[reaper89971]

If the barrel connector male can't handle the the voltage and amperage i will figure something else out. i was thinking of then using a 8 pin ATX connector.

Wondering what the max voltage and amperage is on a ATX 8 pin connector.

 

[Misgar]

Wondering what the max voltage and amperage is on a ATX 8 pin connector.

If you're talking about the 8-pin PCIe connector for a GPU card, read this piece:-
https://www.tomshardware.com/reviews/graphics-card-power-supply-balance,3979-6.html

Obviously the voltage is +12V. The max power is 150W. 150/12=12.5A

So there you have it, 12V 12.5A for an 8-pin PCIe lead or 150W.

If your GPU card needs more power, add another lead for 300W.

More power still, add a third lead for 450W.

Plus the 75W available from the PCIe card slot.

Simple.

 

[Grobe]

The maximum voltage is mostly dependent on how clean it is inside, as the plug itself normally have insulation capable of far higher voltage than normal for laptops.

The practical answer on this require you having proper tool to measure cable insulation dielectric strength - you'll need a Megger for this. If the plug isn't damaged or dirty, having a well known manufacturer, I'd expect it to hold 500V without any issues.
27V should be well within the limits.

The 18A is more questionable. For short burst, yes it would probably goes well - depending on the design of the female plug, i.e. how much contact so to speak.

 

[Misgar]

The maximum voltage is mostly dependent on how clean it is inside,

The 7.4mm Barrel Jack connector is designed for operation below the SELV limit, not for AC mains.
https://en.wikipedia.org/wiki/Extra-low_voltage

This data sheet shows both halves, i.e. the 'socket' inside a Dell laptop and the 'plug' on the end of the power cord. The rating of the pair is 20V DC/10A.
https://www.farnell.com/datasheets/4408834.pdf

I'd expect it to hold 500V without any issues.

Agreed. The data sheet shows the 'Insulation Resistance' as 100MΩ minimum, measured at 500V DC.

The OP should not use the 7.4mm plug above a nominal 20V DC or at currents higher than 10A.

Wondering if i can run 27 volts at 18.50 amps through it.

The simple answer is no. The connector is rated at 20V and 10A.

From an electrical engineering viewpoint, I'd wouldn't be too concerned about using 27V DC at 9A, but NO WAY would I subject it to a continuous 18.5A. It's nearly double the 10A rating.

 

[reaper89971]

The 7.4mm Barrel Jack connector is designed for operation below the SELV limit, not for AC mains.
https://en.wikipedia.org/wiki/Extra-low_voltage

This data sheet shows both halves, i.e. the 'socket' inside a Dell laptop and the 'plug' on the end of the power cord. The rating of the pair is 20V DC/10A.
https://www.farnell.com/datasheets/4408834.pdf


Agreed. The data sheet shows the 'Insulation Resistance' as 100MΩ minimum, measured at 500V DC.

The OP should not use the 7.4mm plug above a nominal 20V DC or at currents higher than 10A.


The simple answer is no. The connector is rated at 20V and 10A.

From an electrical engineering viewpoint, I'd wouldn't be too concerned about using 27V DC at 9A, but NO WAY would I subject it to a continuous 18.5A. It's nearly double the 10A rating.

Thank you so much for your reply

HDPLEX HI-FI DC-ATX 500 watt comes with a 8 pin or 8 wire custom barrel Connector.

The 20v 10amp maximum foils my plans of using the barrel connector.

I will have to do some modification instead.

What connector would be good for 27v 18.50 amps all the time?

Is there a heavy duty medical 8 pin connector out there in the world. I know there is a heavy duty 6 pin medical connector.

Im trying to power a HDPLEX HIFI DC-ATX 500 watt power supply using a Mean Well LOP-500-27

It has a 8 pin DC input. I will have to rig up something custom or solder heavy gauge wire directly or something.

Soldering directly would probably work best. I already removed the modular ports off the power supply. So modification is well under way.