Bidirectional zener-diode question

[ElectroZ]

bidirectional zener diode

Hello,

i was wondering is it possible to replace one bidirectional zener with two unidirectional zeners? Do they equally match each others?

I think that should be possible but if theres for example. a 5.8V bipolar zener, does it also have that reverse threshold voltage of ~0.7V internally?

If so, that means 5.8V bidirectional zener actually starts conducting somewhere around 6.5V where unidirectional starts at 5.8V.. am I right or wrong?

Never really thought about this although i have been working as an electronics designer for over seven years

 

[FvM]

bidirectional zener

Bidirectional suppressor diodes usually don't specify a symmetry or matching parameter, but it can be expected that the matching is closer than with arbitrary choosen exemplars. Also they have a thermal coupling, but regarding all other properties they should behave like two individual diodes.