Thanks George, I had looked at that part but the data sheet was confusing. It did not indicate how to specify low thermal emf or indicate what the emf voltage is. Am I just missing it?
Thanks again, Randy On Fri, Jul 11, 2014 at 1:58 PM, George Atkinson < [email protected]> wrote: > Hi, > The problem is that most low thermal EMF relays (COTO, Picckering etc) use > reed contacts for environment reasons, but reeds are not easy to latch. > The good news is that the Omron G6 range has the options you require (and > just about any other small relay option). > for example the G6AK-274P-STLT-US-DC5 which is dual coil latching, 5v coils > and low thermal EMF. It's about $10 from Mouser. The critical parts of the > number are AK for dual coil latching, AU for single coil latching and STLT > for low thermal EMF DCx is coil voltage, between 3 and 28V. > Datasheet here http://www.mouser.com/ds/2/307/G6A_0911-4215.pdf > > HTH, > Robert G8RPI. > > P.S. Relay contact technology is fascinating. I once specified a lamp rated > (added cadmium in contacts) version of a relay. It was controlled by a PIC > driving 3 linear halogen lamps (see patent US7247429 > < > http://worldwide.espacenet.com/publicationDetails/originalDocument?FT=D&date=20070724&DB=EPODOC&locale=en_EP&CC=US&NR=7247429B2&KC=B2&ND=5 > > > ). A couple of years in production decided that a single letter change in > the part number of the relay didn't matter and saved a couple of dollars. > Guess what, we got failures with welded contacts (fortunatly I'd put a > thermal cutout in series with the lamps, mostly incase my PIC code fell > over, so no fires :-) Took a while before field service caomplained about > poor design...... > Then there are the low level and power rated relays that use a gold flash > over silver. Trouble is if you use it for power they will fail in low level > use. A lot of mil-spec relays use this trick and I've seen problems where > relay swapping for fault finding has swapped a low level with a power and > back. No initial problem, but months later the contacts have gone high. > Then there was the supplier who tested all the new relays - under load, > DOH! > > > On 11 July 2014 19:15, Randy Evans <[email protected]> wrote: > > > That is an assembly but I am looking for an individual relay part that I > > can put on a PCB. > > > > Randy > > > > > > On Fri, Jul 11, 2014 at 7:15 AM, Wim de Jong <[email protected]> > > wrote: > > > > > The http://www.transmille.co.uk/8500.htm > > > > > > Wim de Jong > > > > > > _______________________________________________ > > > volt-nuts mailing list -- [email protected] > > > To unsubscribe, go to https://www.febo.com/cgi-bin/ > > > mailman/listinfo/volt-nuts and follow the instructions there. > > > _______________________________________________ > > > volt-nuts mailing list -- [email protected] > > > To unsubscribe, go to https://www.febo.com/cgi-bin/ > > > mailman/listinfo/volt-nuts > > > and follow the instructions there. > > > > > _______________________________________________ > > volt-nuts mailing list -- [email protected] > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > > and follow the instructions there. > > > _______________________________________________ > volt-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. > _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
