{"product_id":"1-channel-3-3v-relay-module-with-high-low-trigger","title":"1-Channel 3.3V Relay Module with High\/Low Trigger","description":"\u003cdiv class=\"nznpd\"\u003e\n\u003cdiv class=\"nznpd__lead\"\u003e\u003cp class=\"nznpd__intro\"\u003eControl one low-voltage circuit from a controller using this 3.3V relay board. Each channel has an optocoupler input and a jumper to select high- or low-level triggering, with screw terminals for the supply, input and relay contacts.\u003c\/p\u003e\u003c\/div\u003e\n\u003csection class=\"nznpd__block\"\u003e\u003ch3 class=\"nznpd__h\"\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"nznpd__specs\"\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eSupply\u003c\/span\u003e\u003cstrong\u003e3.3V DC\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eChannels\u003c\/span\u003e\u003cstrong\u003e1 independently controlled\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eTrigger\u003c\/span\u003e\u003cstrong\u003eHigh or low, selected by jumper\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eInput stage\u003c\/span\u003e\u003cstrong\u003eOptocoupler per channel\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eContact type\u003c\/span\u003e\u003cstrong\u003eSPDT changeover per channel\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eConnections\u003c\/span\u003e\u003cstrong\u003eScrew terminals\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003ePCB dimensions\u003c\/span\u003e\u003cstrong\u003eApprox. 51 x 25.5 mm\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eSupply terminals\u003c\/span\u003e\u003cstrong\u003eDC+ and DC-\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eIncluded quantity\u003c\/span\u003e\u003cstrong\u003e1 assembled module\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"nznpd__block\"\u003e\u003ch3 class=\"nznpd__h\"\u003eDatasheets\u003c\/h3\u003e\n\u003cdiv class=\"nznpd__ds\"\u003e\u003ca class=\"nznpd__dsbar\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0664\/6127\/0112\/files\/REL-1CH-3V3-Datasheet-v1.pdf\" target=\"_blank\" rel=\"noopener\" aria-label=\"Download the REL-1CH-3V3 datasheet (PDF)\"\u003e\u003csvg width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003cspan\u003eFull technical datasheet\u003c\/span\u003e\u003cspan class=\"nznpd__dsmeta\"\u003ePDF\u003c\/span\u003e\u003c\/a\u003e\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"nznpd__block\"\u003e\u003ch3 class=\"nznpd__h\"\u003eWhat's in the box\u003c\/h3\u003e\n\u003cdiv class=\"nznpd__included\"\u003e\n\u003cdiv class=\"nznpd__qty\"\u003e1×\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e1-Channel 3.3V Relay Module with High\/Low Trigger\u003c\/strong\u003e\u003cp\u003eAssembled module with fitted terminals.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"nznpd__block\"\u003e\u003ch3 class=\"nznpd__h\"\u003eGreat for\u003c\/h3\u003e\n\u003cdiv class=\"nznpd__uses\"\u003e\n\u003cdiv class=\"nznpd__use\"\u003eMicrocontroller switching\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eLow-voltage automation\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eControl-panel prototypes\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"nznpd__block\"\u003e\u003cdiv class=\"nznpd__qs\"\u003e\n\u003ch3\u003eWiring \u0026amp; getting started\u003c\/h3\u003e\n\u003col class=\"nznpd__steps\"\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eSelect the trigger\u003c\/strong\u003e\u003cp\u003eWith power off, set each H\/L jumper to H for high-level triggering or L for low-level triggering.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003ePower the board\u003c\/strong\u003e\u003cp\u003eConnect a regulated 3.3V DC supply to DC+ and DC-. Share DC- with the controller ground and connect its signal to the appropriate IN terminal. Supply the board from a power rail, never directly from a GPIO pin.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eTest before adding the load\u003c\/strong\u003e\u003cp\u003eKeep contact terminals disconnected. Apply the selected input state and check the click, indicator and COM-to-NO continuity. The untriggered state should connect COM to NC.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eConnect the load\u003c\/strong\u003e\u003cp\u003eTurn power off and wire a small low-voltage DC load through COM and NO or NC. Recheck the required power-up state before using the circuit unattended.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003cp class=\"nznpd__note\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e The contact ratings printed on the relay describe the fitted component, not a certified rating for the assembled board. Use low-voltage DC for prototyping and keep exposed terminals protected.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"NZN Electronics","offers":[{"title":"Default Title","offer_id":50521333760096,"sku":"REL-1CH-3V3","price":3.99,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0664\/6127\/0112\/files\/rel-1ch-3v3-hero.png?v=1790334942","url":"https:\/\/www.nznelectronics.co.nz\/products\/1-channel-3-3v-relay-module-with-high-low-trigger","provider":"NZN Electronics","version":"1.0","type":"link"}