So I would expect that this diode can stand at least 500 mA
Does anybody know how much current this diode can withstand as a permanent current
without heating up?
And as an additional question how much current can the PCB-Track from Socket to diode to Vin-pin take without beeing overloaded?
Get the type number (should be inscribed on its body) of the diode ad then consult the corresponding data sheets; you will find all the electrical ratings/charcatersistics of the diode.
The bigger concern is how much heat the voltage regulator can dissipate, which is determined not only by the current being used, but by the voltage being supplied to the regulator.
Why are you asking about this? If you are driving something that needs a considerable amount of current, it should NOT be powered through the Mega board, but through a separate power supply.
The Diode D1 is before the 5V voltage-regulator.
This means If I connect something at Vin-pin the current through this device does not flow through the voltage-regulator
I want to use a 9V 2A Powersupply that is connected to the 5/2.1-socket.
And then at Vin-Pin there is connected a 3A DC-DC-Stepdown regulator for supplying
additional devices.
This means I just plug in one plug into the Arduino and through this one plug
because of the branch before the 5V-voltage-regulator the 5V-voltage-regulator itself has only to supply the microcontroller.
Anyway for a even higher amperage as 0,8A I think I will solder two wires directly to the socket-PCB-kontacts which is then even before the diode D1.
There are pcb trace calculators available to answer this kind of question. But yes, 1A isn't that much for a widish trace - trace heating goes as the square of current though, so 2A would be 4 times worse than 1A, for instance.
The thing that will get hottest first is the regulator though, the diode or trace is not the critical path here.
