Bidirectional TVS Diode application

[helex]

Hello,


Is it possible to use Bidirectional Transient Voltage suppressor (TVS) Diode in 230V AC supply Section across primary of any transformer i.e. before rectification???

My requirement is to protect my system from unwanted Spikes & surges coming in from input supply.
System Specs : Input Supply = 230VAC
Wattage = 140W
Current = 600 mA.

 

[KlausST]

Hi,

Yes.

Look at TVS manufacturer web pages for datasheets and application notes.
This is the best source of detailed and reliable information.

Klaus

 

[ArticCynda]

TVS diodes for main supply are very expensive, and in your application probably not necessary if you're using a transformer for galvanic isolation because the energy contained in transient spikes is so small that after rectification the voltage on the tank capacitors will only rise marginally. If you insist on having protection, then consider a spark gap or a VDR which are cheaper.