I am getting a little confused. What is the maximum permited voltage under IEC
61010 for reinforced insulation using this part?
The ADuM2251 is the 5 kV version of that part (ADuM125x is 2.5 kV). The
certification shows 300 V reinforced for 61010:
Sometimes we get additional certifications after a data sheet is published,
which is probably why it’s not shown in this one (hasn’t been revised in two
years). The certifications always have the most current information.