{"title":"Relays","description":"\u003cp\u003eLatching And Standard\u003c\/p\u003e","products":[{"product_id":"latching-relay-ec2-low-current-coil-gold-alloy-contact-dpdt-250v-2a-3v-5v-or-12v-coils","title":"Latching Relay EC2 Low Current Coil Gold Alloy Contact DPDT 250V 2A 3V 5V or 12V Coils","description":"\u003cp\u003e\u003cbr\u003eThis is a new, miniature electromechanical relay made by NEC-Kemet.\u003c\/p\u003e\n\u003cp\u003eIt is available in several coil voltages as shown in the variations. It is a twin-coil, latching type and has a very low coil drive power of 140mW while maintaining a respectable maximum current rating in the DPDT contacts. The contacts are gold alloy over silver alloy and are designed for telecoms applications with contact currents down to 10uA. This makes them suitable for good quality audio use. This contrasts with other contact types where a minimum current is required in the contacts to clean them on each switching operation.\u003c\/p\u003e\n\u003cp\u003eWhat's a latching relay? In a standard relay the contacts move to the 'on' position when the coil is energised and return to the 'off' position when the coil voltage is turned off. In a latching relay, a momentary operation of the 'on' coil moves the contacts over to the 'on' position where they stay, even when the coil power is removed. To turn them back to the 'off' position, the 'off' coil has to be energised for a moment and then the contacts stay in that position once more. This electromechanical cleverness saves driving power into the relay coil all the time and can be very handy for other reasons, such as retaining their position during a power failure, or when the computer card driving them is turned off for the night. Or crashes.\u003c\/p\u003e\n\u003cp\u003eYou can see an example of how to make a radio station studio switcher using these and the TNU latching types at the following link:\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.interestingelectronics.com\/old\/henrys_interesting_electronics\/switcher\/switcher.htm\" target=\"_blank\" title=\"The Radio Glen Transmit Selector\" rel=\"noopener\"\u003eThe Radio Glen Transmit Selector\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eAs far as I know, with some computer control modifications, that's still being used after twenty years.\u003c\/p\u003e\n\u003cp\u003eHeadline Data\u003c\/p\u003e\n\u003cp\u003eEC2-3TNU\u003cbr\u003eCoil resistance, 3V coil: 64 Ohm\u003cbr\u003eCoil current, 3V coil: 47 mA\u003c\/p\u003e\n\u003cp\u003eEC2-5TNU\u003cbr\u003eCoil resistance, 5V coil: 178 Ohm\u003cbr\u003eCoil current, 5V coil: 28 mA\u003c\/p\u003e\n\u003cp\u003eEC2-12TNU\u003cbr\u003eCoil resistance, 12V coil: 1028 Ohm\u003cbr\u003eCoil current, 12V coil: 12 mA\u003c\/p\u003e\n\u003cp\u003eMax switching voltage: 220 VDC \/ 250 VAC\u003cbr\u003eMax switching current: 2 A\u003cbr\u003eMax carrying current: 2 A\u003cbr\u003eMax carrying current: 2 A\u003c\/p\u003e","brand":"NEC Kemet","offers":[{"title":"3V \/ 1 Relay","offer_id":58814468194688,"sku":"3V EC2-3TNU Q1","price":6.8,"currency_code":"GBP","in_stock":true},{"title":"3V \/ 5 Relays","offer_id":58814468227456,"sku":"3V EC2-3TNU Q5","price":24.8,"currency_code":"GBP","in_stock":true},{"title":"3V \/ 10 Relays","offer_id":58814468260224,"sku":"3V EC2-3TNU Q10","price":39.8,"currency_code":"GBP","in_stock":true},{"title":"5V \/ 1 Relay","offer_id":58814468292992,"sku":"5V EC2-5TNU Q1","price":6.8,"currency_code":"GBP","in_stock":true},{"title":"5V \/ 5 Relays","offer_id":58814468325760,"sku":"5V EC2-5TNU Q5","price":24.8,"currency_code":"GBP","in_stock":true},{"title":"5V \/ 10 Relays","offer_id":58814468358528,"sku":"5V EC2-5TNU Q10","price":39.8,"currency_code":"GBP","in_stock":true},{"title":"12V \/ 1 Relay","offer_id":58814468391296,"sku":"12V EC2-12TNU Q1","price":6.8,"currency_code":"GBP","in_stock":true},{"title":"12V \/ 5 Relays","offer_id":58814468424064,"sku":"12V EC2-12TNU Q5","price":24.8,"currency_code":"GBP","in_stock":true},{"title":"12V \/ 10 Relays","offer_id":58814468456832,"sku":"12V EC2-12TNU Q10","price":39.8,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/2136\/1280\/files\/side_s_06c96bb0-16a9-4352-a2b8-1282db9c77c3.jpg?v=1788112651"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/2136\/1280\/collections\/relays_11.jpg?v=1788112148","url":"https:\/\/shop.usefulcomponents.com\/collections\/relays.oembed","provider":"HJW Electronics","version":"1.0","type":"link"}