Krodal:
retrolefty, a resistor of 1.2mOhm is between pin 2 and 3. So at 30A there is 36 mV between 2 and 3.
Well I would reword that as "the maximum resistance between current terminals is specified as 1.2mOhm" - the resistance
is incidental to the operation of the device since it's a hall-effect sensor - some of that resistance may be the pins, the solder on the
pins, there will be some from the PCB traces too (for 1oz copper board the ohms-per-square is about 0.5mOhm).
Or put another way there will be at least tens of millivolts everywhere at those current levels, and 30A continuous wouldn't be
a sensible application for these sensors.