user28505: I am new to arduino.

Recently purchased motor shield V1.0 which have two l293 and can run 4 DC motors simultaneously.
But here the problem comes: when I purchased the shield I was not aware that it can only supply 2A peak current.
However, my DC motor rating is 12v 5A. So I purchased a 12v 5A power supply.
But now I am not sure to operate shield with external power of 12v 5A.
Does it works or will it burn?

user4143: The shield will "burn". You need a shield that can provide minimum 5A per channel to run a 5A motor.
However, your motors aren't 5A. They have a stall current of 300mA, which is well within the capabilities of the motor shield, and the 5A power supply you have would barely even notice they were there. 

28505: <p><a href="https://i.stack.imgur.com/4IzeN.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/4IzeN.jpg" alt="My motor"></a>I am new to arduino.
<a href="https://i.stack.imgur.com/rl6DQ.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/rl6DQ.jpg" alt="Motor Shield DK Electronics v1.0"></a>
Recently purchased motor shield V1.0 which have two l293 and can run 4 DC motors simultaneously.
But here the problem comes: when I purchased the shield I was not aware that it can only supply 2A peak current.
However, my DC motor rating is 12v 5A. So I purchased a 12v 5A power supply.
But now I am not sure to operate shield with external power of 12v 5A.</p>

<p>Does it works or will it burn?</p>
 4143: <p>The shield will "burn". You need a shield that can provide minimum 5A <em>per channel</em> to run a 5A motor.</p>

<p>However, your motors <em>aren't 5A</em>. They have a stall current of 300mA, which is well within the capabilities of the motor shield, and the 5A power supply you have would barely even notice they were there. </p>
