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-   -   what kind of relay is normally open but will close when triggered? (https://www.diyaudio.com/forums/parts/85036-relay-normally-close-triggered.html)

jarthel 20th August 2006 01:30 PM

what kind of relay is normally open but will close when triggered?
 
would it be dpno? thank you.

mrshow4u 20th August 2006 01:38 PM

Most relays are NO (Normally opened). So you need a double pole? Sometimes they come as DPDT double pole, double throw. If you get DPDT, you can choose to connect to the NC (normally closed) of the NO (normally open) contacts. The other contacts will be the common connection. Here's a typical datasheet <http://pewa.panasonic.com/pcsd/produ...pdf_cat/hc.pdf>

jarthel 21st August 2006 11:31 PM

thanks for the help

AndrewT 22nd August 2006 08:17 AM

Hi,
do you need double pole or would single pole do?
SPST are usually NO. and due to the single contatc are often rated at higher currents


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