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Sender: "piclist-bounces@mit.edu" Date: Thu, 5 Aug 2021 12:12:58 -0700 Subject: Re: [EE] Latching relay ratings Thread-Topic: [EE] Latching relay ratings Thread-Index: AdeKL20zAqCqPGbKR8GTUS+BPS7ksQ== Message-ID: References: List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: Reply-To: Microcontroller discussion list - Public. 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On Thu, Aug 5, 2021, 11:51 AM Bob Blick I gather from the discussion that nobody thinks electromagnetism from a > strong DC current through the relay will influence the relay's latching > response? > Thanks, Bob > > ________________________________________ > From: Bob Blick > Sent: Wednesday, August 4, 2021 3:32 PM > To: Microcontroller discussion list - Public. > Subject: [EE] Latching relay ratings > > I'm helping a friend out with his camper's auxiliary 12 volt power, and > I'd like to set up an automatic low battery disconnect. His solar > controller has a low battery voltage dry contact output but it's rated fo= r > only 0.5A. I know I could just connect a 40 Amp automotive relay to that, > but then there'd be a constant 120 milliamp drain until the battery > disconnected. So I am thinking of using a high current latching relay and > some logic. But all the affordable latching relays, such as this 120 Amp > Omron G9TB-K1ATW-E DC12 are rated for AC only. I'm assuming it's because > high DC current could cause the relay to unlatch due to electromagnetism, > and running 12VDC at 30 Amps through the 277VAC 120A contacts isn't reall= y > going to be a problem. Or am I wrong? > > Bob > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .