[Toa Circuit]

Things that supply current only have a maximum that can be drawn.
To make an analogy to mechanical forces, voltage is like how fast a shaft spins, and amperage is like the torque.

The motor spinning it has a maximum torque, though this might not all be used. (And a load causes a speed drop... unless there is a control loop going on.) A power supply has a maximum output amperage, though that might not be all that is used. (And a load causes a voltage drop... though since the breakout is regulated, it'd be hard to experience this.)