How many amps does the 140W power charger provide at 5 volts?

Apple's 140W charger is intended for charging Apple laptops. See https://www.asme.org/topics-resources/content/explore-the-basics-of-usb-c-and-usb-power-delivery. USB-C power delivery is negotiated by devices. Notionally power is delivered at 5, 9, 15, or 20V, and at up to 5A, making for a maximum of 100W. Presumably Apple have extended the specification slightly. If you want to use this power supply to run a third party hub you will need to make sure that it is able to correctly negotiate the amount of power that it want (watts=volts * current) and then deliver the correct regulated current to each of your devices.

32Chop wrote:

How many amps does the 140-watt power charger provide at 5 volts.

That would appear to 5A. Anything greater would likely start to fry cables.

tt2

I’m not sure I follow the other replies here.

With 140 watts input via USB-C PD, you’ll get 140 watts out at whatever mix of 5V, 9V, 15V, 20V, 28V, 36V, or 48V is needed by the connected device.

USB-C PD has two general power ranges, with the older delivering minimally 7W and up to 100 watts maximally, and the newer USB-C PD 3.1 Extended Power Range (EPR) negotiating some device-specific maximum value and potentially (no pun intended) up to 240 watts from certain devices.

A USB-C powered hub is drawing its power from the Mac or another USB-C PD source via USB-C PD, and does not require an external power connection. AFAIK, the hub will draw from the highest available source, and only from one source.

Check with the hub vendor for specific details and requirements for their particular device, and to confirm EPR support.

Per the following, the Apple 140 watt USB-C charger is EPR:

… https://usbchargingblog.wordpress.com/2022/04/22/apple-140w-usb-c-pd-3-1-epr-power-adapter-part-1-how-it-charges-a-16-inch-macbook-pro-2021/

Above assumes a USB-C PD EPR hub, connected directly to a 140 watt USB-C EPR charger.

The device always determines how much power to draw.

When you plug a 60 watt light bulb into a typical household wall outlet, the outlet may be rated for 15 amps (110 volts x15 amps == 1650watts). The 60 watt bulb is still going to only draw 60watts.

And you can take that same 60watt bulb to a 20amp wall outlet (110 volts x 20 amps == 2200 watts). Same 60 watt draw, same brightness.

So that Apple 140 watt charger will not affect what each device plugged into the hub uses at 5 volts.

Charging Specs:

Apple 2.4A

Samsung 5V, 2A

USB PD 3.1: 5V, 3A | 9V, 3A | 15V, 5A | 20.5V, 5A | 28V, 5A

https://www.zmi.com/blogs/blog/apple-140w-usb-c-gan-power-adapter-dimensions-and-specifications

But normally the Hub & what is connected to it USB wise is going to determine how much the charger gives out...

USB2 = 500mA per port max.

USB3 = 900mA per port max.

USB-C = 1500mA per port max normally but???

I'm agreeing with Phil though.:)

If you are trying to find out if it will damage your iPhone, it won't.

The iPhone will only pull as much power as it needs. You can use the 140watt charger of a Mac to charge an iPhone without any issue.

32Chop wrote:

I need to power a hub for my Mac mini and it draws 5volts and ideally needs 5 amps to be able to power every port.

The powered hub should then have its own power supply, hence the name "Powered Hub". You should not need the Mac's charger to power the Hub at all.

32Chop wrote:

Now it doesn’t come with a power supply. It draws power from the back of the Mac mini.

Then it's not powered. Powered Hubs means it has its own power supply. If it does not come with one, then it's not a powered hub.

You can't just plug in a power adapter into a USB port and think it will then powered.

Powered USB Hubs always have their own power supply.

https://www.amazon.com/Anker-7-Port-Adapter-Charging-iPhone/dp/B014ZQ07NE

Ask the manufacturer, they would know.

This is a user to user support forum

Apple is not here.

Again, contact the manufacturer.