{"product_id":"pc817-optocoupler-1","title":"PC817 Optocoupler","description":"\u003cp\u003e\u003cstrong\u003ePC817 OPTOCOUPLER\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ethe pc817 optocoupler is a widely used electronic isolation component designed to safely transfer signals between two electrically isolated circuits using light. it is also known as an optoisolator because it isolates the input and output sides while allowing signal communication through optical transmission.\u003c\/p\u003e\n\u003cp\u003einside the pc817 package, there are two main components:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003ean infrared led (input side)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ea phototransistor (output side)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ethese components are enclosed inside a compact dip-4 package but remain electrically isolated from each other.\u003c\/p\u003e\n\u003cp\u003ethe working principle of the pc817 is based on optical signal transfer. when current flows through the internal infrared led, it emits infrared light. this light falls on the phototransistor placed inside the same package. the phototransistor detects the light and turns on, allowing current to flow at the output side.\u003c\/p\u003e\n\u003cp\u003ebecause the signal is transferred using light instead of direct electrical connection, the input and output circuits remain electrically isolated. this isolation protects sensitive low-voltage electronics from:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003ehigh voltage spikes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eelectrical noise\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eground loops\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003evoltage surges\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ethe pc817 provides high electrical isolation and reliable signal transfer, making it very useful in industrial electronics and embedded systems.\u003c\/p\u003e\n\u003cp\u003ekey features of the pc817 optocoupler include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003ehigh electrical isolation between circuits\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003einfrared led and phototransistor design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ecompact dip-4 package\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003elow power consumption\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ehigh noise immunity\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003efast switching response\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ereliable and stable operation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003esuitable for low-voltage signal isolation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ethe pc817 is commonly used in:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003esmps feedback circuits\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003emicrocontroller protection circuits\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003erelay isolation systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eindustrial automation equipment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003earduino and esp32 interfacing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eswitching power supplies\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003esignal isolation circuits\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003emotor driver isolation systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eembedded electronics projects\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ein smps power supplies, the pc817 is often used to transfer feedback signals safely from the secondary side to the primary side without direct electrical connection.\u003c\/p\u003e\n\u003cp\u003ethe optocoupler is especially important in circuits where high-voltage and low-voltage sections must communicate safely while remaining electrically isolated.\u003c\/p\u003e\n\u003cp\u003eoverall, the pc817 optocoupler is a reliable, compact, and efficient signal isolation component that provides safe optical communication between circuits, making it essential in power electronics, automation systems, embedded electronics, and industrial control applications.\u003c\/p\u003e","brand":"Electro Robo Store","offers":[{"title":"Default Title","offer_id":52482123530516,"sku":"MT0389","price":32.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0979\/6590\/0052\/files\/PC817.jpg?v=1778237582","url":"https:\/\/electro-robo.com\/products\/pc817-optocoupler-1","provider":"Electro Robo Store","version":"1.0","type":"link"}