{"id":5068,"date":"2025-11-06T02:11:13","date_gmt":"2025-11-06T02:11:13","guid":{"rendered":"https:\/\/www.telaled.com\/?p=5068"},"modified":"2026-01-09T03:06:55","modified_gmt":"2026-01-09T03:06:55","slug":"oque-e-diodo","status":"publish","type":"post","link":"https:\/\/www.telaled.com\/en\/oque-e-diodo\/","title":{"rendered":"What is a diode? Its function, types, and role in electronics are explained."},"content":{"rendered":"<section class=\"section\" id=\"section_1324645416\">\n\t\t<div class=\"bg section-bg fill bg-fill  bg-loaded\" >\n\n\t\t\t\n\t\t\t\n\t\t\t\n\t<div class=\"is-border\"\n\t\tstyle=\"border-color:rgb(235, 235, 235);border-width:1px 0px 0px 0px;\">\n\t<\/div>\n\n\t\t<\/div>\n\n\t\t\n\n\t\t<div class=\"section-content relative\">\n\t\t\t\n<div class=\"row\"  id=\"row-833217910\">\n\n\t<div id=\"col-777321076\" class=\"col small-12 large-12\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.telaled.com\/en\/oque-e-diodo\/#O_que_e_diodo_Um_guia_claro_e_pratico\" >What is a diode? A clear and practical guide.<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.telaled.com\/en\/oque-e-diodo\/#1_Ideia_basica_e_como_funcionam_os_diodos\" >1. Basic idea and how diodes work<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.telaled.com\/en\/oque-e-diodo\/#2_Principais_termos_eletricos_resumido\" >2. Main electrical terms (summarized)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.telaled.com\/en\/oque-e-diodo\/#Tipos_comuns_de_diodos_e_suas_funcoes\" >Common types of diodes and their functions<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.telaled.com\/en\/oque-e-diodo\/#2_Diodo_Emissor_de_Luz\" >2. Light Emitting Diode<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.telaled.com\/en\/oque-e-diodo\/#3_Diodo_Zener\" >3. Zener Diode<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.telaled.com\/en\/oque-e-diodo\/#4_Diodo_Schottky\" >4. Schottky Diode<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.telaled.com\/en\/oque-e-diodo\/#5_Fotodiodo\" >5. Photodiode<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.telaled.com\/en\/oque-e-diodo\/#6_Diodo_Varactor\" >6. Varactor Diode<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.telaled.com\/en\/oque-e-diodo\/#Aplicacoes_praticas\" >Practical applications<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.telaled.com\/en\/oque-e-diodo\/#Como_o_diodo_se_comportam_em_uma_curva_I-V\" >How do diodes behave on an IV curve?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.telaled.com\/en\/oque-e-diodo\/#Materiais_e_Tendencias_Modernas\" >Materials and Modern Trends<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.telaled.com\/en\/oque-e-diodo\/#Circuitos_simples_que_voce_pode_experimentar\" >Simple circuits you can try.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.telaled.com\/en\/oque-e-diodo\/#Dicas_de_seguranca_e_selecao\" >Safety and selection tips<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.telaled.com\/en\/oque-e-diodo\/#Lista_rapida_de_solucao_de_problemas\" >Quick troubleshooting checklist<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.telaled.com\/en\/oque-e-diodo\/#Resumo_final\" >Final summary<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"O_que_e_diodo_Um_guia_claro_e_pratico\"><\/span>What is a diode? A clear and practical guide.<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>What is a diode? A diode is a small electronic component that allows electric current to flow primarily in one direction. You can think of it as a one-way valve for electricity. This unique characteristic makes diodes useful in many circuits.<\/p>\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_542326628\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"600\" src=\"https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/oque-e-diodo.webp\" class=\"attachment-large size-large\" alt=\"What is a diode?\" srcset=\"https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/oque-e-diodo.webp 900w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/oque-e-diodo-300x200.webp 300w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/oque-e-diodo-768x512.webp 768w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/oque-e-diodo-18x12.webp 18w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/oque-e-diodo-600x400.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_542326628 {\n  width: 90%;\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"gap-281244092\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-281244092 {\n  padding-top: 10px;\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"gap-180843439\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-180843439 {\n  padding-top: 10px;\n}\n<\/style>\n\t<\/div>\n\t\n<h4><span class=\"ez-toc-section\" id=\"1_Ideia_basica_e_como_funcionam_os_diodos\"><\/span><strong>1. Basic idea and how diodes work<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>A diode has two terminals: the anode and the cathode. When a positive voltage is applied to the anode and a lower voltage to the cathode, the diode conducts current. In reverse polarity, it blocks the passage of current.<\/p>\n<p>This happens because a diode contains a PN junction. One side is doped to have extra electrons (N-type). The other side is doped to have extra holes (P-type). At the junction, a thin depletion region forms. This region creates a barrier that prevents current from passing through it, unless the applied voltage is high enough to drive charge carriers across it.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"2_Principais_termos_eletricos_resumido\"><\/span><strong>2. Main electrical terms (summarized)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li><strong>Forward voltage (Vf):<\/strong> The voltage drop when the diode conducts (\u2248 0.7V for silicon)<\/li>\n<li><strong>Reverse breakdown voltage (Vbr):<\/strong> The reverse voltage at which the diode begins to conduct in the reverse direction.<\/li>\n<li><strong>Maximum direct current (If):<\/strong> the maximum safe current that the diode can withstand.<\/li>\n<li><strong>Reverse leakage current (Ir):<\/strong> A small current flows when the diode is reverse biased.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Tipos_comuns_de_diodos_e_suas_funcoes\"><\/span>Common types of diodes and their functions<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>1. Rectifier diode:<\/strong><\/p>\n<p>It converts alternating current into direct current. You can find this in<\/p>\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_2023480293\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"600\" src=\"https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/Diodo-retificador.webp\" class=\"attachment-large size-large\" alt=\"Rectifier diode\" srcset=\"https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/Diodo-retificador.webp 900w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/Diodo-retificador-300x200.webp 300w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/Diodo-retificador-768x512.webp 768w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/Diodo-retificador-18x12.webp 18w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/Diodo-retificador-600x400.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_2023480293 {\n  width: 90%;\n}\n<\/style>\n\t<\/div>\n\t\n<h4><span class=\"ez-toc-section\" id=\"2_Diodo_Emissor_de_Luz\"><\/span><strong>2. Light Emitting Diode<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>LEDs emit light when an electric current passes through them. They are used in displays, indicators, and lighting systems.<\/p>\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_1958326404\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"600\" src=\"https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/light-emitting-diode.jpg\" class=\"attachment-large size-large\" alt=\"light emitting diode\" srcset=\"https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/light-emitting-diode.jpg 900w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/light-emitting-diode-300x200.jpg 300w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/light-emitting-diode-768x512.jpg 768w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/light-emitting-diode-18x12.jpg 18w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/light-emitting-diode-600x400.jpg 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_1958326404 {\n  width: 90%;\n}\n<\/style>\n\t<\/div>\n\t\n<h4><span class=\"ez-toc-section\" id=\"3_Diodo_Zener\"><\/span><strong>3. Zener Diode<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Designed to operate in safe reverse break mode, and used for voltage regulation and protection.<\/p>\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_1247839061\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"600\" src=\"https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/Diodo-Zener.webp\" class=\"attachment-large size-large\" alt=\"Zener Diode\" srcset=\"https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/Diodo-Zener.webp 900w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/Diodo-Zener-300x200.webp 300w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/Diodo-Zener-768x512.webp 768w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/Diodo-Zener-18x12.webp 18w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/Diodo-Zener-600x400.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_1247839061 {\n  width: 90%;\n}\n<\/style>\n\t<\/div>\n\t\n<h4><span class=\"ez-toc-section\" id=\"4_Diodo_Schottky\"><\/span><strong>4. Schottky Diode<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Designed to operate in safe reverse break mode, and used for voltage regulation and protection.<\/p>\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_771552879\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"600\" src=\"https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/diodo-Schottky.webp\" class=\"attachment-large size-large\" alt=\"\" srcset=\"https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/diodo-Schottky.webp 900w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/diodo-Schottky-300x200.webp 300w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/diodo-Schottky-768x512.webp 768w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/diodo-Schottky-18x12.webp 18w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/diodo-Schottky-600x400.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_771552879 {\n  width: 90%;\n}\n<\/style>\n\t<\/div>\n\t\n<h4><span class=\"ez-toc-section\" id=\"5_Fotodiodo\"><\/span><strong>5. Photodiode<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>It converts light into electrical current, and is commonly used in radio frequency tuning circuits.<\/p>\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_1020349551\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"600\" src=\"https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/fotodiodo.webp\" class=\"attachment-large size-large\" alt=\"photodiode\" srcset=\"https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/fotodiodo.webp 900w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/fotodiodo-300x200.webp 300w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/fotodiodo-768x512.webp 768w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/fotodiodo-18x12.webp 18w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/fotodiodo-600x400.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_1020349551 {\n  width: 90%;\n}\n<\/style>\n\t<\/div>\n\t\n<h4><span class=\"ez-toc-section\" id=\"6_Diodo_Varactor\"><\/span><strong>6. Varactor Diode<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>It converts light into electrical current, and is commonly used in radio frequency tuning circuits.<\/p>\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_232712738\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"600\" src=\"https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/diodo-varactor.webp\" class=\"attachment-large size-large\" alt=\"varactor diode\" srcset=\"https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/diodo-varactor.webp 900w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/diodo-varactor-300x200.webp 300w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/diodo-varactor-768x512.webp 768w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/diodo-varactor-18x12.webp 18w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/diodo-varactor-600x400.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_232712738 {\n  width: 90%;\n}\n<\/style>\n\t<\/div>\n\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_1349518276\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"600\" src=\"https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/Aplicacoes-praticas.webp\" class=\"attachment-large size-large\" alt=\"Practical applications\" srcset=\"https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/Aplicacoes-praticas.webp 900w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/Aplicacoes-praticas-300x200.webp 300w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/Aplicacoes-praticas-768x512.webp 768w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/Aplicacoes-praticas-18x12.webp 18w, https:\/\/www.telaled.com\/wp-content\/uploads\/2025\/11\/Aplicacoes-praticas-600x400.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_1349518276 {\n  width: 90%;\n}\n<\/style>\n\t<\/div>\n\t\n<h3><span class=\"ez-toc-section\" id=\"Aplicacoes_praticas\"><\/span>Practical applications<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Cell phone chargers and power adapters use rectifier diodes to convert alternating current into direct current.<\/li>\n<li>LEDs light up status indicators and displays.<\/li>\n<li>Zener diodes protect sensitive electronic components against voltage spikes.<\/li>\n<li>Schottky diodes are used in switched-mode power supplies for increased efficiency.<\/li>\n<li>Photodiodes are found in remote controls, light meters, and optical receivers.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Como_o_diodo_se_comportam_em_uma_curva_I-V\"><\/span>How do diodes behave on an IV curve?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Plot the graph of current as a function of voltage. In the forward bias region, an exceptional increase in current is observed as soon as the voltage exceeds the threshold (Vf). In the reverse bias region, the current is practically zero until it reaches the breakdown voltage. At the breakdown point, the current increases sharply, unless it is limited by a resistor or by the circuit design.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Materiais_e_Tendencias_Modernas\"><\/span><strong>Materials and Modern Trends<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Silicon is the standard material. Germanium was initially used due to its lower forward voltage drop, but it is less stable. Gallium arsenide (GaAs) and gallium nitride (GaN) perform specific functions: GaAs for optoelectronics and high-frequency applications; GaN and silicon carbide (SiC) for high-power, high-efficiency switching. These materials reduce losses and heating in power systems.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Circuitos_simples_que_voce_pode_experimentar\"><\/span>Simple circuits you can try.<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>LED indicator:<\/strong> Diode + resistor in series + battery. Works as a visual test.<\/li>\n<li><strong>Half-wave rectifier:<\/strong> A single diode converts alternating current pulses into pulsating direct current.<\/li>\n<li><strong>Bridge rectifier:<\/strong> Four diodes provide full-wave rectified direct current from alternating current. Add a capacitor to smooth the output.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Dicas_de_seguranca_e_selecao\"><\/span><strong>Safety and selection tips<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Check the maximum forward current and maximum reverse voltage for your circuit.<\/li>\n<li>Add a current-limiting resistor to the LEDs.<\/li>\n<li>Use heat sinks or choose a diode with a higher power rating when dealing with high currents.<\/li>\n<li>For switching applications, adjust the recovery time and forward voltage drop of the diode to the frequency and voltage of your circuit.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Lista_rapida_de_solucao_de_problemas\"><\/span>Quick troubleshooting checklist<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>The diode has an open circuit in both directions: it is probably burned out.<\/li>\n<li>It conducts in both directions: it&#039;s probably short-circuited.<\/li>\n<li>High forward voltage or no light in an LED: check the series resistor or the wiring.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Resumo_final\"><\/span>Final summary<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A diode controls the direction of electric current. This simple rule allows for various applications: rectification, light emission, voltage reference, detection, and tuning. If you work with electronics, you will use diodes frequently. They are small, inexpensive, and efficient.<\/p>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>\n\t\t<\/div>\n\n\t\t\n<style>\n#section_1324645416 {\n  padding-top: 60px;\n  padding-bottom: 60px;\n  min-height: 300px;\n  background-color: rgb(245, 245, 245);\n}\n<\/style>\n\t<\/section>","protected":false},"excerpt":{"rendered":"","protected":false},"author":7,"featured_media":5077,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,21],"tags":[64,57,60,58,65,63,59,61,62],"class_list":["post-5068","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","category-intercambio-tecnico","tag-componentes-eletricos","tag-diodo","tag-diodo-zener","tag-eletronica","tag-fluxo-de-corrente","tag-juncao-pn","tag-led","tag-retificador","tag-semicondutor"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Oque e diodo? 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