{"product_id":"adafruit-stemma-non-latching-mini-relay","title":"Adafruit STEMMA Non-Latching Mini Relay","description":"\u003cp\u003eThis is the \u003cstrong\u003eSTEMMA Non-Latching Mini Relay\u003c\/strong\u003e. It gives you power to control, and control over power. Put simply, you can now turn on and off lamps, fans, solenoids, and other small appliances that run on up to 250VAC or DC power using any microcontroller or microcomputer, with ease.\u003c\/p\u003e\n\u003cp\u003eNo worrying about flyback diodes, level shifting, pin protection. The STEMMA board takes care of all that for you. You can use it with any 3V or 5V microcontroller\/microcomputer. To use with a breadboard, Raspberry Pi or Arduino, pair with a JST 3-pin to breadboard cable.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThis  board has a single \u003cstrong\u003eSignal\u003c\/strong\u003e pin (the white wire). Normally, the relay's \u003cstrong\u003eCOM\u003c\/strong\u003e pin is connected mechanically to the \u003cstrong\u003eNC\u003c\/strong\u003e pin and the \u003cstrong\u003eNO \u003c\/strong\u003epin is disconnected.\u003c\/li\u003e\n\u003cli\u003eWhen the \u003cstrong\u003eSignal\u003c\/strong\u003e pin is pulled high, the relay switches and the internal switch changes so that the \u003cstrong\u003eCOM\u003c\/strong\u003e pin is mechanically connected to the \u003cstrong\u003eNO\u003c\/strong\u003e pin and \u003cstrong\u003eNC\u003c\/strong\u003e is then disconnected\u003c\/li\u003e\n\u003cli\u003eWhen the relay is active, a red LED is lit, and about 50mA of current from the red power wire is used to keep the coil switched on. Note, if power is lost, the relay will go back 'open'.\u003c\/li\u003e\n\u003cli\u003eThe connects for the relay are the white tubular thing at the far end of the PCB. You can poke wire into the holes, they will automatically grip onto wire that is 24AWG to 18AWG. Once you poke the wire in, give it a light pull to verify its clamped. To release the wire, use a thin screwdriver or pen to press on the button on the top while pulling the wire out.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYou can switch up to 2A of resistive current at 30VDC or ~40VAC or lower. At 110VDC you can switch up to 0.3A, at 120VAC up to 0.5A, and at 250VAC you can switch up to 0.6A. Check the datasheet for the relay for the exact switching capacity, and of course, for reactive\/inductive loads you will need to de-rate. This isn't a relay you can use to turn on and off your washer\/dryer, stick to 60W or less.\u003c\/p\u003e\n\u003cp\u003eEach STEMMA board comes with a fully assembled and tested PCB but no cable. No soldering is required to use it. There's an optional second switch on the side of the PCB, if you get a 3-pin terminal block you can solder that in place, but its optional.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note:\u003c\/strong\u003e If using with high voltages (\u0026gt; 24V) use care and common sense! High voltages require experience, and are only for use by engineers who are comfortable with guidelines and know how to use safely!\u003c\/p\u003e\n\u003ch2\u003eTECHNICAL DETAILS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAssembled dimensions: 34.3mm x 21.6mm x 11.3mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eLEARN\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/learn.adafruit.com\/adafruit-stemma-non-latching-mini-relay\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ePrimary Guide: Adafruit STEMMA Non-Latching Mini Relay\u003c\/a\u003e - Get the power to control, and control over power with STEMMA!\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":31078331056211,"sku":"ADA4409","price":5.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/products\/4409-02.jpg?v=1572617991","url":"https:\/\/shop.pimoroni.com\/en-eu\/products\/adafruit-stemma-non-latching-mini-relay","provider":"Pimoroni Ltd","version":"1.0","type":"link"}