Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!gem.mps.ohio-state.edu!ginosko!uunet!sco!deanr From: deanr@sco.COM (Dean Reece) Newsgroups: sci.electronics Subject: Re: Latching Relay - does such a thing exist Summary: Latching relays exist and are available from surplus houses Keywords: relay, latching, All Electronics Message-ID: <3335@scolex.sco.COM> Date: 25 Sep 89 18:15:46 GMT References: <3558@dgis.daitc.mil> Reply-To: deanr@sco.com (Dean Reece) Followup-To: sci.electronics Organization: The Santa Cruz Operation, Inc. Lines: 43 In <3558@dgis.daitc.mil> generous@dgis.daitc.mil (Curtis Generous) writes: > I have an application where I need to activate a SPDT set of contacts > such that the toggle action does not release after the coil voltage is > removed. > And I should then be able to toggle back the contacts with another pulse. ... > If anyone knows of such a device, or can think of a way of building one.... Yes they exist, and Ive used them before. Specifically, You want a single coil latching relay. The dual coil configuration is more common (where one coil is energised to set, the other is energised to reset). All Electronics Corp. is a surplus parts dealer that I've dealt with many times. They are fairly reliable and represent their merchandise well (unlike some surplus dealers). All Electronics Corp. sells a small assortment of latching relays: Coil: Action: Description: Part Number: Price: -------- ------- ----------------------------------------- ------------- ----- 12 VDC SPDT Dual coil latching relay. LRLY-12DC $2.50 650 Ohms Operates on 7.5 to 26 VDC. -------- ------- ----------------------------------------- ------------- ----- 12 VDC SPDT Electrol latching reed relay. Sealed Case LRLY-121 $2.00 340 Ohms 1+9/16" X 1/2" with P.C Terminals. bipolar Latches open or closed when coil voltage polarity is reversed -------- ------- ----------------------------------------- ------------- ----- 12 VDC 4PDT Aromat # NCP-JPL-2-DC12V PC Board mount LRLY-124 $4.00 90 Ohms flat pack. 1.5" X 1" X .429" -------- ------- ----------------------------------------- ------------- ----- Single 1x SPDT Midtex 24 Vac coil. 3 sets of contacts. IMRLY-24AC $4.50 24 VAC 2x SPST Contacts open or close with each impulse. 10 Amps *** This is probably the one you want *** -------- ------- ----------------------------------------- ------------- ----- All Electronics Corp: 1-800-826-5432 (from areas 818 & 213: 818-904-0524) P.O.Box 567, Van Nuys, CA 91408 - Visa, Master Card, and Discover (no COD) The prices and descriptions above are reprinted without permission from the All Electronics Corp. Spring 1989 Catalog. - I hereby disclaim thee - hope it helps - Dean Reece - ______________________________________________________________________ | Dean Reece Member Technical Staff |"The flames are all long gone | | The Santa Cruz Operation 408/458-1422 | but the pain lingers on" | |___________deanr@sco.com_______________|___________________Pink_Floyd_|