{"id":1303,"date":"2022-09-13T05:02:58","date_gmt":"2022-09-13T05:02:58","guid":{"rendered":"https:\/\/ledask.com\/?p=1303"},"modified":"2022-09-13T13:34:42","modified_gmt":"2022-09-13T13:34:42","slug":"bc549-transistor","status":"publish","type":"post","link":"https:\/\/ledask.com\/bc549-transistor\/","title":{"rendered":"BC549 Transistor: A Comprehensive and Detailed Guide"},"content":{"rendered":"\n<p>About BC549 Transistor, NPN, and PNP transistors are families of <a href=\"https:\/\/www.ourpcb.com\/transistor-projects.html\" target=\"_blank\" rel=\"noreferrer noopener\">transistors<\/a> falling under BJT. BJT (bipolar junction transistors) use electron holes and electrons as their source of charge carriers. &#xA0;<\/p>\n\n\n\n<p>In today&#8217;s article, we will discuss a type of <a href=\"https:\/\/en.wikipedia.org\/wiki\/Bipolar_junction_transistor#NPN\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">NPN transistor<\/a> known as BC549. We&#8217;ll give you a piece of detailed information on its features, operating principle, pinout, applications, and alternatives. &#xA0;<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"what-is-a-bc549-transistor\"><strong>What is a BC549 Transistor?<\/strong><\/h2>\n\n\n<p>BC549 transistor is a general-purpose BJT falling in the NPN transistor family. It has three layers which include one P-<a href=\"https:\/\/en.wikipedia.org\/wiki\/Doping_(semiconductor)\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">doped<\/a> layer and two N-doped layers. Additionally, it comprises two PN junctions. One is in a reverse-biased state, while the other is in a state of forward-biasing. &#xA0;<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/jMAhhA1coML22lPPQutqIxWpZ11Inb0M8lBSy9Sw9IwZx8dZ9bcGkqO-1g6eqWDLJwWb_95IeQQHEq9PaZh0uOIA2YTnUW6vjs7VrZnFpwyhM85lqpwb8wlo9PTTky3P4jzA1oozxGIZFrzedg\" alt=\"\"\/><\/figure><\/div>\n\n\n<p><p style=\"text-align: center;\"><strong><em>A PN junction<\/em><\/strong><\/p><\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"bc549-transistor-pinout-and-pin-configuration\"><strong>BC549 Transistor Pinout and Pin Configuration<\/strong><\/h2>\n\n\n<p>BC549 has three pins, the emitter, base, and collector pins. Despite being different in doping concentration and operation, the three pins connect externally to other circuits.<\/p>\n\n\n\n<p>The base voltage is smaller than the collector voltage. Also, compared to other terminals, the emitter terminal has high doping. &#xA0;<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/OLYAxL0pooFIHaDkJGnWihQRq67Ud3T1jHSPvXbJTmmbzGwg0QCguc11mofsgLUFvamJiEflHF_VEUpqoPh_UkAIW0AnUdiK0jOBFw4r4QnOHmzmFGVkN0nZUGxyNTKs0ljwBY5nSsJ3Rjmw5g\" alt=\"BC549 electric symbol and terminals&#xA0;\"\/><\/figure><\/div>\n\n\n<p class=\"has-text-align-center\"><p class=\"has-text-align-center\" style=\"text-align: center;\"><strong><em>BC549 electric symbol and terminals&nbsp;<\/em><\/strong><\/p>\n<p>&nbsp;<\/p><\/p>\n\n\n\n<ul><li>Emitter terminal\/pin1 &#x2013; It often drains the current.<\/li><li>Base terminal\/pin2 controls the current between the emitter and collector.<\/li><li>Collector pin\/pin3 &#x2013; It allows current flow.<\/li><\/ul>\n\n\n\n<p>Furthermore, you can use the BC549 transistor for three main configurations, namely;<\/p>\n\n\n\n<ul><li>Common collector configuration,<\/li><li>The standard base configuration, and<\/li><li>Common emitter configuration.<\/li><\/ul>\n\n\n\n<p>The common emitter type is applicable mainly since it has exact voltage and current rating values for the amplification process.<\/p>\n\n\n\n<p>Beta (&#x3B2;) is an <a href=\"https:\/\/en.wikipedia.org\/wiki\/Amplification_factor\">amplification factor<\/a> that defines the amplification&#8217;s nature. Practically, it&#8217;s the ratio between base current and collector current. Often, we have an amplification factor ranging from 420 to 800 in a BC549 transistor.<\/p>\n\n\n\n<p>Conversely, we have alpha (&#x3B1;) as the current gain (ratio between emitter current and collector current). The value ranges from 0.95 to 0.99, but you can also use it as a unity. &#xA0;<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"bc549-transistor-features\"><strong>BC549 Transistor Features<\/strong><\/h2>\n\n\n<p>BC549 transistor has the specifications and features;<\/p>\n\n\n\n<ul><li>First, it has a maximum collector-emitter voltage (V<sub>CE<\/sub>) of 30V. Similarly, the maximum collector-base voltage (V<sub>CB<\/sub>) is also 30V.<\/li><li>Then, the maximum emitter-base voltage is 5V.<\/li><li>It&#8217;s a low voltage and low current NPN transistor.<\/li><li>The collector <a href=\"https:\/\/en.wikipedia.org\/wiki\/Capacitance\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">capacitance<\/a> is 4.5 pF, whereas the transition frequency is 200MHz.<\/li><li>The minimum and maximum DC gain also range from 110 to 800.<\/li><li>The maximum collector current is 100mA, while the maximum collector dissipation is 500mW.<\/li><li>In addition, its maximum operating temperature and storage should range from -65&#xB0;C to +150&#xB0;C.<\/li><li>Lastly, its package type is SOT54 and TO-92.<\/li><\/ul>\n\n\n<h2 class=\"wp-block-heading\" id=\"bc549-working-principle\"><strong>BC549 Working Principle<\/strong><\/h2>\n\n\n<p>Under normal circumstances, the emitter voltage in the BC549 transistor is 5V. That means when you apply the 5V at its base terminal, it&#8217;ll receive biasing and then trigger an electron reaction.<\/p>\n\n\n\n<p>The base terminal in the BC549 transistor works like a control valve that regulates electrons&#8217; numbers.<\/p>\n\n\n\n<p>Later, the collector terminal collects the emitted electrons from the base terminal. However, since the collector current is 100mA, the transistor won&#8217;t favor a large load.<\/p>\n\n\n\n<p>Moreover, because you only need 5V to begin the electron reaction process, <a href=\"https:\/\/www.ourpcb.com\/microcontroller-vs-microprocessor.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">microprocessors and microcontrollers<\/a> can benefit from it. &#xA0;<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"bc549-transistor-as-an-amplifier%25c2%25a0\"><strong>BC549 transistor as an amplifier&#xA0;<\/strong><\/h2>\n\n\n<p>If it functions as an amplifier, you&#8217;ll only use a small current as an input signal at the base pin. The process results in a larger electric current at emitter and collector terminals. &#xA0;<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"bc549-as-a-switch%25c2%25a0\"><strong>BC549 as a switch&#xA0;<\/strong><\/h3>\n\n\n<p>BC549 switches a small current in one transistor part so that other transistor parts have larger currents.<\/p>\n\n\n\n<p>Furthermore, it&#8217;ll hold two different value states in one and zero forms. You&#8217;ll mostly encounter the scenario in a computer&#8217;s memory chip where you can turn a transistor off and on individually. &#xA0;<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"what-can-i-use-instead-of-a-bc549-transistor\"><strong>What can I use Instead of a BC549 Transistor?<\/strong><\/h2>\n\n\n<p>Under circumstances where you lack a BC549 transistor, you can use its equivalents like 2N2222, <a href=\"https:\/\/www.youtube.com\/watch?v=pMGtN1SEL4U\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">BC547<\/a>, BC550, or BC548 NPN. &#xA0;<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/jjB-QJexNuyyoZaPnb3RPeZCfV2n_yfGyaKIdB-oS0bBrdHvt0rYrtiB5u4WYYFCW4QyBJ5N14BVQuiHpt393JX5WUnmdVrPLsaAhWAxQNIctf6Cqzml22d-yq-TmKdEEZOD76KjjYLlYzvCyw\" alt=\"BC549 Transistor: \"\/><\/figure><\/div>\n\n\n<p class=\"has-text-align-center\"><strong><em>BC548 transistor&nbsp;<\/em><\/strong><\/p>\n\n\n\n<p><strong><em>Source; <\/em><\/strong><a href=\"https:\/\/en.wikipedia.org\/wiki\/File:TO-92,_BC548_(front,_shaded).svg\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><strong><em>Wikipedia<\/em><\/strong><\/a><strong><em>&nbsp;<\/em><\/strong> &nbsp;<\/p>\n\n\n\n<p>Often, the pinouts of the replacements can vary from the ones in BC549. Therefore, it is advisable to check the pin configurations before use.<\/p>\n\n\n\n<p>Additionally, you can opt for complementary PNP transistors like BC557, BC560, and BC559. &#xA0;<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"applications\"><strong>Applications<\/strong><\/h2>\n\n\n<p>Some of the applications of the BC549 transistors include the following;<\/p>\n\n\n\n<ul><li>Audio noise filters in audio frequency equipment,<\/li><li><a href=\"https:\/\/www.ourpcb.com\/light-sensor-switch-circuit.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Sensor circuits<\/a>,<\/li><li>Bistable and <a href=\"https:\/\/en.wikipedia.org\/wiki\/Multivibrator\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">astable multivibrators<\/a>,<\/li><\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/3KYj6XiRaqFj8Ymq9J9ZiJ4u2PgwQwtIInYGtFu1Z8WUYZdDax23PsjHJ94hob_qbmIDIBRlD-4XmZohvvtEDbrFLPIsH8DZTjzrdss5egSIc5BONIP1PljOFtxEBmHo4EV7hG4kJkCmKfqJLg\" alt=\"BC549 Transistor: A basic BJT astable multivibrator&#xA0;\"\/><\/figure><\/div>\n\n\n<p class=\"has-text-align-center\"><strong><em>A basic BJT astable multivibrator&nbsp;<\/em><\/strong><\/p>\n\n\n\n<p><strong><em>Source; <\/em><\/strong><a href=\"https:\/\/en.wikipedia.org\/wiki\/File:Transistor_Multivibrator.svg\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><strong><em>Wikipedia<\/em><\/strong><\/a> &#xA0;<\/p>\n\n\n\n<ul><li>Current mirror circuits,<\/li><li>Oscillator and comparator circuits,<\/li><li>Small signal amplifiers and audio amplification,<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.wellpcb.com\/wp-content\/uploads\/2022\/02\/1-5.jpg\" alt=\"BC549 Transistor: guitar amplifier\" class=\"wp-image-63036\"\/><\/figure>\n\n\n\n<p class=\"has-text-align-center\"><p class=\"has-text-align-center\" style=\"text-align: center;\">(guitar amplifier)<\/p> <p>&#xA0;<\/p><\/p>\n\n\n\n<ul><li>Darlington pair,<\/li><li>The LED array sequence controller<\/li><li>Small current load switching of under 100mA.<\/li><\/ul>\n\n\n<h2 class=\"wp-block-heading\" id=\"conclusion\"><strong>Conclusion<\/strong><\/h2>\n\n\n<p>The BC549 transistor is an NPN that allows the current to flow from the collector to the emitter terminal. You&#8217;ll often find it in switching applications or for signal amplification purposes that require current loads less than 100mA.<\/p>\n\n\n\n<p>For more information on the BC549 transistor, kindly <a href=\"https:\/\/www.ourpcb.com\/\">reach out<\/a> to us. &nbsp; &nbsp;<\/p>\n<!-- Ezoic - wp_native_bottom - native_bottom --><div id=\"ezoic-pub-ad-placeholder-167\" data-inserter-version=\"-1\"><\/div><!-- End Ezoic - wp_native_bottom - native_bottom -->","protected":false},"excerpt":{"rendered":"<p> &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"BC549 Transistor: A Comprehensive and Detailed Guide\" class=\"read-more button\" href=\"https:\/\/ledask.com\/bc549-transistor\/#more-1303\" aria-label=\"More on BC549 Transistor: A Comprehensive and Detailed Guide\">Read more<\/a><\/p>\n","protected":false},"author":4,"featured_media":1304,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>BC549 Transistor: A Comprehensive and Detailed Guide<\/title>\n<meta name=\"description\" content=\"About BC549 Transistor, NPN and PNP transistors are families of transistors falling under BJT.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ledask.com\/bc549-transistor\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"BC549 Transistor: A Comprehensive and Detailed Guide\" \/>\n<meta property=\"og:description\" content=\"About BC549 Transistor, NPN and PNP transistors are families of transistors falling under BJT.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ledask.com\/bc549-transistor\/\" \/>\n<meta property=\"og:site_name\" content=\"LEDask.com: A Blog about LED and Green Energy in General\" \/>\n<meta property=\"article:published_time\" content=\"2022-09-13T05:02:58+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-09-13T13:34:42+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/BC549-Transistor.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"900\" \/>\n\t<meta property=\"og:image:height\" content=\"557\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Bob Lory\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Bob Lory\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/ledask.com\/bc549-transistor\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/ledask.com\/bc549-transistor\/\"},\"author\":{\"name\":\"Bob Lory\",\"@id\":\"https:\/\/ledask.com\/#\/schema\/person\/284d5a79ed578ef6e4c822efee1dd3e5\"},\"headline\":\"BC549 Transistor: A Comprehensive and Detailed Guide\",\"datePublished\":\"2022-09-13T05:02:58+00:00\",\"dateModified\":\"2022-09-13T13:34:42+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/ledask.com\/bc549-transistor\/\"},\"wordCount\":788,\"publisher\":{\"@id\":\"https:\/\/ledask.com\/#\/schema\/person\/db8ee36df6c577c94349942caa1a52d2\"},\"image\":{\"@id\":\"https:\/\/ledask.com\/bc549-transistor\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/BC549-Transistor.jpg\",\"articleSection\":[\"How\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/ledask.com\/bc549-transistor\/\",\"url\":\"https:\/\/ledask.com\/bc549-transistor\/\",\"name\":\"BC549 Transistor: A Comprehensive and Detailed Guide\",\"isPartOf\":{\"@id\":\"https:\/\/ledask.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/ledask.com\/bc549-transistor\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/ledask.com\/bc549-transistor\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/BC549-Transistor.jpg\",\"datePublished\":\"2022-09-13T05:02:58+00:00\",\"dateModified\":\"2022-09-13T13:34:42+00:00\",\"description\":\"About BC549 Transistor, NPN and PNP transistors are families of transistors falling under BJT.\",\"breadcrumb\":{\"@id\":\"https:\/\/ledask.com\/bc549-transistor\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/ledask.com\/bc549-transistor\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/ledask.com\/bc549-transistor\/#primaryimage\",\"url\":\"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/BC549-Transistor.jpg\",\"contentUrl\":\"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/BC549-Transistor.jpg\",\"width\":900,\"height\":557,\"caption\":\"BC549 Transistor\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/ledask.com\/bc549-transistor\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/ledask.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"BC549 Transistor: A Comprehensive and Detailed Guide\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/ledask.com\/#website\",\"url\":\"https:\/\/ledask.com\/\",\"name\":\"LEDask.com: A Blog about LED and Green Energy in General\",\"description\":\"A Blog about LED and Green Energy in General\",\"publisher\":{\"@id\":\"https:\/\/ledask.com\/#\/schema\/person\/db8ee36df6c577c94349942caa1a52d2\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/ledask.com\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":[\"Person\",\"Organization\"],\"@id\":\"https:\/\/ledask.com\/#\/schema\/person\/db8ee36df6c577c94349942caa1a52d2\",\"name\":\"Bob Smith\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/ledask.com\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/ledask.com\/wp-content\/uploads\/2022\/08\/cropped-cropped-350-70.png\",\"contentUrl\":\"https:\/\/ledask.com\/wp-content\/uploads\/2022\/08\/cropped-cropped-350-70.png\",\"width\":350,\"height\":70,\"caption\":\"Bob Smith\"},\"logo\":{\"@id\":\"https:\/\/ledask.com\/#\/schema\/person\/image\/\"},\"sameAs\":[\"https:\/\/ledask.com\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/ledask.com\/#\/schema\/person\/284d5a79ed578ef6e4c822efee1dd3e5\",\"name\":\"Bob Lory\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/ledask.com\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/8d2de856c6e9ff308c9a23b5a9929d12?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/8d2de856c6e9ff308c9a23b5a9929d12?s=96&d=mm&r=g\",\"caption\":\"Bob Lory\"},\"url\":\"https:\/\/ledask.com\/author\/bob-lory\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"BC549 Transistor: A Comprehensive and Detailed Guide","description":"About BC549 Transistor, NPN and PNP transistors are families of transistors falling under BJT.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/ledask.com\/bc549-transistor\/","og_locale":"en_US","og_type":"article","og_title":"BC549 Transistor: A Comprehensive and Detailed Guide","og_description":"About BC549 Transistor, NPN and PNP transistors are families of transistors falling under BJT.","og_url":"https:\/\/ledask.com\/bc549-transistor\/","og_site_name":"LEDask.com: A Blog about LED and Green Energy in General","article_published_time":"2022-09-13T05:02:58+00:00","article_modified_time":"2022-09-13T13:34:42+00:00","og_image":[{"width":900,"height":557,"url":"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/BC549-Transistor.jpg","type":"image\/jpeg"}],"author":"Bob Lory","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Bob Lory","Est. reading time":"5 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/ledask.com\/bc549-transistor\/#article","isPartOf":{"@id":"https:\/\/ledask.com\/bc549-transistor\/"},"author":{"name":"Bob Lory","@id":"https:\/\/ledask.com\/#\/schema\/person\/284d5a79ed578ef6e4c822efee1dd3e5"},"headline":"BC549 Transistor: A Comprehensive and Detailed Guide","datePublished":"2022-09-13T05:02:58+00:00","dateModified":"2022-09-13T13:34:42+00:00","mainEntityOfPage":{"@id":"https:\/\/ledask.com\/bc549-transistor\/"},"wordCount":788,"publisher":{"@id":"https:\/\/ledask.com\/#\/schema\/person\/db8ee36df6c577c94349942caa1a52d2"},"image":{"@id":"https:\/\/ledask.com\/bc549-transistor\/#primaryimage"},"thumbnailUrl":"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/BC549-Transistor.jpg","articleSection":["How"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/ledask.com\/bc549-transistor\/","url":"https:\/\/ledask.com\/bc549-transistor\/","name":"BC549 Transistor: A Comprehensive and Detailed Guide","isPartOf":{"@id":"https:\/\/ledask.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/ledask.com\/bc549-transistor\/#primaryimage"},"image":{"@id":"https:\/\/ledask.com\/bc549-transistor\/#primaryimage"},"thumbnailUrl":"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/BC549-Transistor.jpg","datePublished":"2022-09-13T05:02:58+00:00","dateModified":"2022-09-13T13:34:42+00:00","description":"About BC549 Transistor, NPN and PNP transistors are families of transistors falling under BJT.","breadcrumb":{"@id":"https:\/\/ledask.com\/bc549-transistor\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/ledask.com\/bc549-transistor\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/ledask.com\/bc549-transistor\/#primaryimage","url":"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/BC549-Transistor.jpg","contentUrl":"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/BC549-Transistor.jpg","width":900,"height":557,"caption":"BC549 Transistor"},{"@type":"BreadcrumbList","@id":"https:\/\/ledask.com\/bc549-transistor\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/ledask.com\/"},{"@type":"ListItem","position":2,"name":"BC549 Transistor: A Comprehensive and Detailed Guide"}]},{"@type":"WebSite","@id":"https:\/\/ledask.com\/#website","url":"https:\/\/ledask.com\/","name":"LEDask.com: A Blog about LED and Green Energy in General","description":"A Blog about LED and Green Energy in General","publisher":{"@id":"https:\/\/ledask.com\/#\/schema\/person\/db8ee36df6c577c94349942caa1a52d2"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/ledask.com\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":["Person","Organization"],"@id":"https:\/\/ledask.com\/#\/schema\/person\/db8ee36df6c577c94349942caa1a52d2","name":"Bob Smith","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/ledask.com\/#\/schema\/person\/image\/","url":"https:\/\/ledask.com\/wp-content\/uploads\/2022\/08\/cropped-cropped-350-70.png","contentUrl":"https:\/\/ledask.com\/wp-content\/uploads\/2022\/08\/cropped-cropped-350-70.png","width":350,"height":70,"caption":"Bob Smith"},"logo":{"@id":"https:\/\/ledask.com\/#\/schema\/person\/image\/"},"sameAs":["https:\/\/ledask.com"]},{"@type":"Person","@id":"https:\/\/ledask.com\/#\/schema\/person\/284d5a79ed578ef6e4c822efee1dd3e5","name":"Bob Lory","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/ledask.com\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/8d2de856c6e9ff308c9a23b5a9929d12?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/8d2de856c6e9ff308c9a23b5a9929d12?s=96&d=mm&r=g","caption":"Bob Lory"},"url":"https:\/\/ledask.com\/author\/bob-lory\/"}]}},"_links":{"self":[{"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/posts\/1303"}],"collection":[{"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/comments?post=1303"}],"version-history":[{"count":4,"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/posts\/1303\/revisions"}],"predecessor-version":[{"id":1387,"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/posts\/1303\/revisions\/1387"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/media\/1304"}],"wp:attachment":[{"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/media?parent=1303"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/categories?post=1303"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/tags?post=1303"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}