Isotherm  AC/DC Converter  This device transforms AC power into 24V DC power for the compressor. For use with models with DC module installed.

Available in  110V

For an alternative, consider upgrading to part IS-SEG00030GA, this is a control module with the AC converter built in ($279). The AC/DC module has only been available since 2015. The DC module you have, if it is still working, is a good spare to have.

This converter cannot be used with the SEC Smart Energy Control or the ITC Intellegent Temperature control