{"product_id":"denon-20205004900as-zener-diode-39v-0-5w","title":"Denon 20205004900as Zener Diode 39V 0.5W","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe DENON 20205004900as is a 39-volt zener diode rated at 0.5 watts, used as a voltage-regulation component in Denon consumer electronics. Zener diodes hold a fixed reverse-breakdown voltage, protecting downstream circuit stages from voltage spikes and ensuring stable reference levels. This part is identified by the internal designation ZJ39B and is a direct OEM replacement intended for technicians performing board-level repair on Denon receivers and related audio equipment. Component-level soldering skills and proper ESD precautions are required for correct installation.\u003c\/p\u003e\u003cp\u003eThis diode is drawn from Denon's triac, diode, and resistor parts line, covering consumer electronics and receiver applications. It is suited for repair shops and electronics technicians who perform component-level service on Denon audio equipment rather than full-board swaps. The 0.5-watt power rating makes it appropriate for low-power signal and regulation circuits commonly found in AV receiver designs.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e39-volt zener breakdown voltage for stable voltage regulation\u003c\/li\u003e\n\u003cli\u003e0.5-watt power dissipation rating\u003c\/li\u003e\n\u003cli\u003eOEM Denon part for accurate like-for-like replacement\u003c\/li\u003e\n\u003cli\u003eInternal designation ZJ39B for cross-reference identification\u003c\/li\u003e\n\u003cli\u003eDesigned for board-level repair of Denon consumer electronics\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM replacement component for Denon receivers and consumer electronics requiring a 39V 0.5W zener diode. Verify the ZJ39B designation and circuit location on the service schematic before ordering.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified electronics technician with component-level soldering experience. Power down and unplug the unit completely before beginning any board-level work, and allow filter capacitors to discharge fully. Use proper ESD precautions including a grounded wrist strap and anti-static work surface. Observe correct diode polarity by referencing the service schematic before soldering.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e: 39 volts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Rating\u003c\/strong\u003e: 0.5 watts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent Type\u003c\/strong\u003e: Zener Diode\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Designation\u003c\/strong\u003e: ZJ39B\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: DENON\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 20205004900as\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DENON","offers":[{"title":"Default Title","offer_id":51204308336946,"sku":"20205004900AS","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/307141284.jpg?v=1779707179","url":"https:\/\/voomisupply.com\/products\/denon-20205004900as-zener-diode-39v-0-5w","provider":"Voomi Supply","version":"1.0","type":"link"}