retrolefty, your answer scares me.Look at the pcb, how short the distance is between the current side and the signal side of the sensor. There is even a signal line under the chip.
Anyone know if this is suitable for the mains? say 3A max @ 240v AC (UK). I had a quick skim through the datasheet, and didn't seem to find anything :/Chiel | about 3 years ago 1the ACS712 is rated to 5A and after searching around on the web for projects using this ic at 220v i would say its usable in europe. the datasheet mentions a Peak Basic isolation voltage of ~380 Volt which could be the maximum voltage the ic can handle. i hope this answers your question.mattkenny | about 3 years ago 1I'm using the 20A version of this chip in a device to sense mains current @240V/50Hz (Australia). It handles it just fine.
retrolefty, a resistor of 1.2mOhm is between pin 2 and 3. So at 30A there is 36 mV between 2 and 3.