Unfortunately those voltages are a fact of life. To protect a circuit with up to 132 vac allowed, a device has to be created higher than that or it may short out during normal operations.NeverDie said:
At the time I thought I was being smart because the clamping voltage is listed at 150v, but after reading this thread I'm noticing that the "let through rating" is 330/400/400, which doesn't sound so good (?). What would have been a better surge strip to purchase?
A 150 vac device has to allow the peak voltage of the AC waveform so multipkybthe 150 by 1.414 to get 212 volts DC.
By the time some impedance and other factors are allowed for your 3-400 volts are probably just more truthfully than some other brands being most of them are probably using the same MOV devices anyway.
Never mind the troll factor here. This is very common for many to toss insults around when they cannot argue intelligently with somebody basically paraphrasing an accepted source like IEEE documents.