In related question you wrote that 500V surge gives 0.5A through ISO1212 https://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/768338/iso1212-recommended-cin-for-surge-protection
However, it is not clear when the device starts to swallow 0.5A when it can work up to 60V with current selected by Rsense value, for example, 2mA.
What is inside ISO1212 to start taking more than the selected current value above 60V and what is the exact value of this breakdown voltage?
It is also related to one more thread https://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/852396/iso1212-voltage-rating-of-cin where the voltage limit of the capacitor is recommended to be 60V without any surge *note.
So something is contradictory or the circuit has additional capabilities that are not described in the datasheet.