{"product_id":"a222-pc817c-optocoupler-high-voltage-phototransistor-photocupler-smd-4","title":"A222 PC817C Optocoupler - High Voltage Phototransistor Photocupler (SMD-4)","description":"\u003cp data-path-to-node=\"8\"\u003eThe \u003cb data-path-to-node=\"8\" data-index-in-node=\"4\"\u003ePC817C\u003c\/b\u003e is a popular \u003cb data-path-to-node=\"8\" data-index-in-node=\"24\"\u003e4-pin optocoupler\u003c\/b\u003e consisting of an Infrared Emitting Diode (IRED) optically coupled to a phototransistor. It provides \u003cb data-path-to-node=\"8\" data-index-in-node=\"142\"\u003e5kV isolation\u003c\/b\u003e, making it essential for feedback loops in switching power supplies (SMPS) and protecting delicate control circuitry in professional audio mixers and amplifiers.\u003c\/p\u003e\n\u003ch4 data-path-to-node=\"9\"\u003e\u003cb data-path-to-node=\"9\" data-index-in-node=\"0\"\u003eTechnical Specifications\u003c\/b\u003e\u003c\/h4\u003e\n\u003cul data-path-to-node=\"10\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,0,0\"\u003e\u003cb data-path-to-node=\"10,0,0\" data-index-in-node=\"0\"\u003eType:\u003c\/b\u003e Phototransistor Output Optocoupler\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,1,0\"\u003e\u003cb data-path-to-node=\"10,1,0\" data-index-in-node=\"0\"\u003eCurrent Transfer Ratio (CTR):\u003c\/b\u003e 200% to 400% (C-Grade classification)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,2,0\"\u003e\u003cb data-path-to-node=\"10,2,0\" data-index-in-node=\"0\"\u003eIsolation Voltage:\u003c\/b\u003e 5,000 Vrms (High safety margin)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,3,0\"\u003e\u003cb data-path-to-node=\"10,3,0\" data-index-in-node=\"0\"\u003eCollector-Emitter Voltage (\u003cspan class=\"math-inline\" data-math=\"V_{CEO}\" data-index-in-node=\"27\"\u003e$V_{CEO}$\u003c\/span\u003e):\u003c\/b\u003e 80V (Max)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,4,0\"\u003e\u003cb data-path-to-node=\"10,4,0\" data-index-in-node=\"0\"\u003eForward Current (\u003cspan class=\"math-inline\" data-math=\"I_F\" data-index-in-node=\"17\"\u003e$I_F$\u003c\/span\u003e):\u003c\/b\u003e 50mA\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,5,0\"\u003e\u003cb data-path-to-node=\"10,5,0\" data-index-in-node=\"0\"\u003ePackage:\u003c\/b\u003e 4-Pin SMD (Gull-wing leads)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-path-to-node=\"11\"\u003e\u003cb data-path-to-node=\"11\" data-index-in-node=\"0\"\u003eKey Applications for slvsales.in Customers\u003c\/b\u003e\u003c\/h4\u003e\n\u003cul data-path-to-node=\"12\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,0,0\"\u003e\u003cb data-path-to-node=\"12,0,0\" data-index-in-node=\"0\"\u003eSwitching Power Supplies:\u003c\/b\u003e Used in the feedback circuit of amplifier power modules to maintain stable voltage.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,1,0\"\u003e\u003cb data-path-to-node=\"12,1,0\" data-index-in-node=\"0\"\u003eGround Loop Isolation:\u003c\/b\u003e Prevents noise and hum in audio signals by electrically isolating different sections of a circuit.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,2,0\"\u003e\u003cb data-path-to-node=\"12,2,0\" data-index-in-node=\"0\"\u003eSystem Protection:\u003c\/b\u003e Acts as a safety barrier between high-power stages and sensitive microcontrollers\/DSP chips in digital mixers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SLVSALES","offers":[{"title":"Default Title","offer_id":45763995959482,"sku":null,"price":5.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0687\/6377\/9258\/files\/Screenshot2026-04-09161935.png?v=1775731864","url":"https:\/\/www.slvsales.in\/products\/a222-pc817c-optocoupler-high-voltage-phototransistor-photocupler-smd-4","provider":"SLVSALES","version":"1.0","type":"link"}