The Brother D00CTB001 is a low-voltage power supply PCB for printer servicing. It is identified as a 230V single board, giving the part a clear electrical variant for the supported printer configurations.
The parts list names the DCP-L3510CDW, DCP-L3517CDW and DCP-L3550CDW among the models using this part. This specific board is intended for those listed configurations; the model references help distinguish it from other voltage and board variants in the same parts catalogue.