user54105: What is the maximum current that can be supplied to an Arduino Mega board before frying/breaking?
Basically i have several components connected to my board which draw a total current of 1.6A (which i calculated through a table), and thinking of using a 9V 2A power supply. I know that the arduino voltage limit is 7-12V but just wondering about the current as I can't find it on the datasheets?
Thanks in advance!

user2967: Your question isn't clear. Are you talking about drawing regulated 5V from the Arduino power supply? I believe the built-in regulator has a hard limit if 1A total output, but how much you can draw from it will depend on various factors (mostly how much waste heat it generates. If you drive it from 9V it will generate quite a bit of heat, since a linear regulator simply dissipates the excess voltage as heat. Better to use a 7V supply) 
You won't be able to draw 1.6A of 5V from the Arduino. You should probably get a separate 2A 5V regulated power supply for your external components. Again though, your question isn't very clear so I'm not sure I'm answering what you're asking.

user1576: 
From the ATmega328P datasheet.

user42539: 1A coming in thru the barrel jack connecor, then you risk blowing the 1A rated reverse polarity protection diode. The 5V regulator will overheat at high currents above 7.5V. The chip itself can have 800mA put thru if if properly cooled and the IO limits of current per port are respected.
So 1.6A, no way.

54105: <p>What is the maximum current that can be supplied to an Arduino Mega board before frying/breaking?</p>

<p>Basically i have several components connected to my board which draw a total current of 1.6A (which i calculated through a table), and thinking of using a 9V 2A power supply. I know that the arduino voltage limit is 7-12V but just wondering about the current as I can't find it on the datasheets?</p>

<p>Thanks in advance!</p>
 2967: <p>Your question isn't clear. Are you talking about drawing regulated 5V from the Arduino power supply? I believe the built-in regulator has a hard limit if 1A total output, but how much you can draw from it will depend on various factors (mostly how much waste heat it generates. If you drive it from 9V it will generate quite a bit of heat, since a linear regulator simply dissipates the excess voltage as heat. Better to use a 7V supply) </p>

<p>You won't be able to draw 1.6A of 5V from the Arduino. You should probably get a separate 2A 5V regulated power supply for your external components. Again though, your question isn't very clear so I'm not sure I'm answering what you're asking.</p>
 1576: <p><a href="https://i.stack.imgur.com/nLAlB.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/nLAlB.png" alt="enter image description here"></a></p>

<p>From the <a href="http://www.atmel.com/Images/doc8161.pdf" rel="nofollow noreferrer">ATmega328P datasheet</a>.</p>
 42539: <p>1A coming in thru the barrel jack connecor, then you risk blowing the 1A rated reverse polarity protection diode. The 5V regulator will overheat at high currents above 7.5V. The chip itself can have 800mA put thru if if properly cooled and the IO limits of current per port are respected.</p>

<p>So 1.6A, no way.</p>
