{"id":8444,"date":"2023-11-02T08:27:08","date_gmt":"2023-11-02T08:27:08","guid":{"rendered":"https:\/\/lhm-instrumentation.eu\/?p=8444"},"modified":"2023-11-16T09:20:20","modified_gmt":"2023-11-16T09:20:20","slug":"what-is-a-diode","status":"publish","type":"post","link":"https:\/\/lhm-instrumentation.eu\/en\/kenniscentrum\/wat-is-een-diode\/","title":{"rendered":"What is a diode?"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><div class=\"vc_row wpb_row vc_row-fluid\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<h4>What is a diode?<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-8445\" src=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode1.jpg\" alt=\"\" width=\"713\" height=\"358\" srcset=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode1.jpg 713w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode1-300x151.jpg 300w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode1-370x186.jpg 370w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode1-360x181.jpg 360w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode1-200x100.jpg 200w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode1-400x201.jpg 400w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode1-100x50.jpg 100w\" sizes=\"auto, (max-width: 713px) 100vw, 713px\" \/><\/p>\n<p>A\u00a0<strong>diode<\/strong>\u00a0is a semiconductor component that forms a kind of one-way switch for current. It allows current to flow easily in one direction, but hardly at all in the opposite direction.<\/p>\n<p>Diodes are also called\u00a0<strong>rectifiers<\/strong>\u00a0called diodes, because they convert alternating current (AC) into pulsating direct current (DC). Diodes are classified according to type, voltage and current capacity.<\/p>\n<p>Diodes are polar: they have a\u00a0<strong>anode<\/strong>\u00a0(positive side) and a\u00a0<strong>cathode<\/strong>\u00a0(negative side). Most diodes allow current to flow only when positive voltage is applied to the anode. Different diode configurations are shown in this figure:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-8446\" src=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode2.jpg\" alt=\"\" width=\"713\" height=\"355\" srcset=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode2.jpg 713w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode2-300x149.jpg 300w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode2-370x184.jpg 370w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode2-360x179.jpg 360w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode2-200x100.jpg 200w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode2-400x199.jpg 400w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode2-100x50.jpg 100w\" sizes=\"auto, (max-width: 713px) 100vw, 713px\" \/><\/p>\n<figure class=\"center\"><figcaption>Diodes are available in different configurations. From left to right: metal housing, screw diode, plastic housing with band, plastic housing with chamfer, glass housing.<\/figcaption><\/figure>\n<p>When a diode allows current passage, it is\u00a0<strong>polarised in the forward direction<\/strong>. When a diode involves\u00a0<strong>preload in the locking direction<\/strong>, it acts as an insulator and does not allow power passage.<\/p>\n<p>Strange but true: The arrow of the diode symbol points in the opposite direction of electron emission. Reason: The symbol was devised by engineers and in their schematic representation, current flow proceeds from the positive (+) side of the voltage source to the negative (-). The same convention is applied for semiconductor symbols in which arrows are used: the arrow points in the \u2018usual\u2019 permitted direction of current flow, and against the permitted direction of electron flow.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-8447\" src=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode3.jpg\" alt=\"\" width=\"715\" height=\"360\" srcset=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode3.jpg 715w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode3-300x151.jpg 300w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode3-370x186.jpg 370w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode3-360x181.jpg 360w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode3-200x101.jpg 200w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode3-400x201.jpg 400w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode3-100x50.jpg 100w\" sizes=\"auto, (max-width: 715px) 100vw, 715px\" \/><\/p>\n<p>In a diode test of a digital multimeter, the diode produces a small voltage between the test wires, which is sufficiently strong to polarize a layer diode in the forward direction. The normal voltage drop is between 0.5 and 0.8 V. The resistance of a properly functioning diode in the forward direction is between 1000 ohms and 10 ohms if all goes well. When there is bias voltage in the reverse direction, the display of a\u00a0<a href=\"https:\/\/lhm-instrumentation.eu\/en\/products\/hvac\/multimeters\/\">digital multimeter<\/a>\u00a0the value OL is displayed (this indicates a very high resistance).<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-8448\" src=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode4.jpg\" alt=\"\" width=\"714\" height=\"359\" srcset=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode4.jpg 714w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode4-300x151.jpg 300w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode4-370x186.jpg 370w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode4-360x181.jpg 360w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode4-200x101.jpg 200w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode4-400x201.jpg 400w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode4-100x50.jpg 100w\" sizes=\"auto, (max-width: 714px) 100vw, 714px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-8449\" src=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode5.jpg\" alt=\"\" width=\"715\" height=\"358\" srcset=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode5.jpg 715w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode5-300x150.jpg 300w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode5-370x185.jpg 370w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode5-360x180.jpg 360w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode5-200x100.jpg 200w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode5-400x200.jpg 400w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode5-100x50.jpg 100w\" sizes=\"auto, (max-width: 715px) 100vw, 715px\" \/><\/p>\n<p>Diodes are rated for a specific current rating. If this is exceeded and the diode fails, a short circuit may occur and a) current may flow in both directions or b) current may be stopped in both directions.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-8450\" src=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode6.jpg\" alt=\"\" width=\"715\" height=\"358\" srcset=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode6.jpg 715w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode6-300x150.jpg 300w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode6-370x185.jpg 370w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode6-360x180.jpg 360w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode6-200x100.jpg 200w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode6-400x200.jpg 400w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode6-100x50.jpg 100w\" sizes=\"auto, (max-width: 715px) 100vw, 715px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-8451\" src=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode7.jpg\" alt=\"\" width=\"714\" height=\"360\" srcset=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode7.jpg 714w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode7-300x151.jpg 300w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode7-370x187.jpg 370w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode7-360x182.jpg 360w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode7-200x101.jpg 200w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode7-400x202.jpg 400w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode7-100x50.jpg 100w\" sizes=\"auto, (max-width: 714px) 100vw, 714px\" \/><\/p>\n<p><strong>Reference:<\/strong>\u00a0Digital Multimeter Principles by Glen A. Mazur, American Technical Publishers.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<div class=\"vc_empty_space\"   style=\"height: 32px\"><span class=\"vc_empty_space_inner\"><\/span><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p style=\"text-align: center;\"><a class=\"maxbutton-6 maxbutton maxbutton-vraag-advies-aan-onze-experts\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/lhm-instrumentation.eu\/en\/contact\/\"><span class='mb-text'>Ask our experts for advice<\/span><\/a><\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div><div class=\"vc_row wpb_row vc_row-fluid\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"vc_empty_space\"   style=\"height: 100px\"><span class=\"vc_empty_space_inner\"><\/span><\/div><\/div><\/div><\/div><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"Wat is een diode? Een\u00a0diode\u00a0is een halfgeleidercomponent die een soort eenrichtingsschakelaar voor stroom vormt. Hij laat stroom in de ene richting gemakkelijk vloeien, maar nauwelijks in de tegenovergestelde richting. Diodes worden ook wel\u00a0gelijkrichters\u00a0genoemd, omdat ze wisselstroom (AC) omzetten in pulserende...","protected":false},"author":9,"featured_media":8445,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[302,279],"tags":[],"class_list":["post-8444","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-algemeen","category-kenniscentrum"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Wat is een diode? - LHM Instrumentation<\/title>\n<meta name=\"description\" content=\"Een diode is een halfgeleidercomponent die een soort eenrichtingsschakelaar voor stroom vormt. Hij laat stroom in de ene richting gemakkelijk vloeien, maar nauwelijks in de tegenovergestelde richting.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lhm-instrumentation.eu\/en\/knowledge-centre\/what-is-a-diode\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Wat is een diode? - LHM Instrumentation\" \/>\n<meta property=\"og:description\" content=\"Een diode is een halfgeleidercomponent die een soort eenrichtingsschakelaar voor stroom vormt. Hij laat stroom in de ene richting gemakkelijk vloeien, maar nauwelijks in de tegenovergestelde richting.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lhm-instrumentation.eu\/en\/knowledge-centre\/what-is-a-diode\/\" \/>\n<meta property=\"og:site_name\" content=\"LHM Instrumentation\" \/>\n<meta property=\"article:published_time\" content=\"2023-11-02T08:27:08+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-11-16T09:20:20+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/11\/Diode1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"713\" \/>\n\t<meta property=\"og:image:height\" content=\"358\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Jens Bonnier\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jens Bonnier\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/lhm-instrumentation.eu\\\/kenniscentrum\\\/wat-is-een-diode\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/lhm-instrumentation.eu\\\/kenniscentrum\\\/wat-is-een-diode\\\/\"},\"author\":{\"name\":\"Jens Bonnier\",\"@id\":\"https:\\\/\\\/lhm-instrumentation.eu\\\/#\\\/schema\\\/person\\\/0c3284f1bfd014a9daffe08670692569\"},\"headline\":\"Wat is een diode?\",\"datePublished\":\"2023-11-02T08:27:08+00:00\",\"dateModified\":\"2023-11-16T09:20:20+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/lhm-instrumentation.eu\\\/kenniscentrum\\\/wat-is-een-diode\\\/\"},\"wordCount\":395,\"image\":{\"@id\":\"https:\\\/\\\/lhm-instrumentation.eu\\\/kenniscentrum\\\/wat-is-een-diode\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/lhm-instrumentation.eu\\\/wp-content\\\/uploads\\\/2023\\\/11\\\/Diode1.jpg\",\"articleSection\":[\"Algemeen\",\"Kenniscentrum\"],\"inLanguage\":\"en-GB\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/lhm-instrumentation.eu\\\/kenniscentrum\\\/wat-is-een-diode\\\/\",\"url\":\"https:\\\/\\\/lhm-instrumentation.eu\\\/kenniscentrum\\\/wat-is-een-diode\\\/\",\"name\":\"Wat is een diode? - LHM Instrumentation\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/lhm-instrumentation.eu\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/lhm-instrumentation.eu\\\/kenniscentrum\\\/wat-is-een-diode\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/lhm-instrumentation.eu\\\/kenniscentrum\\\/wat-is-een-diode\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/lhm-instrumentation.eu\\\/wp-content\\\/uploads\\\/2023\\\/11\\\/Diode1.jpg\",\"datePublished\":\"2023-11-02T08:27:08+00:00\",\"dateModified\":\"2023-11-16T09:20:20+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/lhm-instrumentation.eu\\\/#\\\/schema\\\/person\\\/0c3284f1bfd014a9daffe08670692569\"},\"description\":\"Een diode is een halfgeleidercomponent die een soort eenrichtingsschakelaar voor stroom vormt. 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