Hi all,

I'm looking for a relay that will handle voltage up to 1500VDC at a very low current, and switching/controlling voltage has to be 5V. I've searched in most major catalogs and can't seem to find any relay that meets the spec. Does such product even exist? Thank all for your help in advance, much appreciated!

 

You may be spec'ed out of existence. Those voltages usually switch in vacuum - http://www.surplussales.com/Relays/REVacRel-4.html.

 

[eta] After re-reading the requirements (DPDT) I realized that the switch I posted a link to doesn't meet the requirements - nor do they have any suitable relays.
Found on this page:
http://www.gigavac.com/products/relays/gigavac/index.htm

Kind of a pain to find, because they don't have the coil voltage rating on the search page.

 

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=725-1029-ND

SPST 15KV NO, 5V coil, maybe put a few together to make the DPDT function?

Steve

 

Hi all,

I'm looking for a relay that will handle voltage up to 1500VDC at a very low current, and switching/controlling voltage has to be 5V. I've searched in most major catalogs and can't seem to find any relay that meets the spec. Does such product even exist? Thank all for your help in advance, much appreciated!

I am not sure about the 5V but Kilovac can do the high voltage ---
http://relays.tycoelectronics.com/kilovac


(* jcl *)

 

Thank you all for your help. After reading through the pages, I have a question.

What does the relay parameter "Contact Rating @ Voltage" mean? It seems that the relays are able to handle high voltage at low current, and high current at low voltage. In the particular application I'm interested in, it has very low current. (less than 0.5mA) Does that mean I can use a relay that is perhaps rated for 3A @ 30VDC? If not, what will happen if I use it?

Also, how is the voltage rating on relays determined? By the amount of insulation to prevent arcing?

Thanks again for your help.

 

I believe you're right, it must be the amount of insulation that dictates the voltage rating. Remember, relay contacts can be fairly close and high voltage may arc to make contact. There is a separate switching power rating, which is in VA or watts. Clearly, you're under this rating for almost any relay.

Steve

 

Steve, do you think this will work?

http://www.cotorelay.com/5500.pdf

 

Steve, do you think this will work?

http://www.cotorelay.com/5500.pdf

The spec on one of those relays is 5 volts and the rating of the voltage between the switched contacts appears to be 10kva. So I think it will work.

 

Is your name Steve?

What PRS said

Steve