# For a stack of thyristors, is the “critical rate of rise of off-state voltage” scalable with the number of thyristors?

For example, in a datasheet I am looking at, the critical rate of rise of off-state voltage is given as $$2000V/{\mu s}.$$

If I have, say, five of these thyristors in series, would the total critical rate of rise of off-state voltage then be $$5\cdot 2000 V/{\mu s}?$$

Thanks!

• Doubtful. The parasitic capacitance of each may be different leading to dv/dt that's different from 1/5 of the total applied dv/dt. There's probably some safe factor like maybe 4*spec based on worst case process differences+margin for physical parasitic differences but I don't know what it is. – John D Jun 6 at 15:31