jmdiels:
And if I am not wrong, I can basically connect the motor to a rated 20A source... the motor will not fry, it will take the 6A it requires, according to the U=R.I rule ?
According to this info....
http://www.datasheetlib.com/datasheet/693809/m49sp-1_mitsumi-electric.html?page=2#datasheet
They reckon it's 30 Ohm per 'phase'. So expecting 400 milliAmp per phase at around 12V DC. They reckon 4 phases. So assuming 1 coil is 1 phase, then expecting about 1.6 Amp needed. But since L298N can only handle a certain amount of power ..... the L298N could be out of normal operation limits. See what happens if you drop the RAW motor supply voltage to some smaller value (less than 12V DC)..... such as 8V DC or maybe 10 V DC.