ACS756KCA-050B-PFF-T is an obsolete current sensor and I was able to find an active part that is extremely similar. Here are the specifications I used to find a replacement:
|Sensor Type||Hall Effect, Open Loop|
|Mounting Type||Through Hole|
|Packge/Case||5-CA Formed Leads|
I tried matching these values as close as possible, the lowest cost alternative is part number 620-1320-ND; manufacturer part number ACS758LCB-050B-PFF-T. There are some minor differences with the main specifications, but the package designs look identical and everything else is a direct match considering the specifications.