{"id":6356,"date":"2021-10-30T01:26:02","date_gmt":"2021-10-29T23:26:02","guid":{"rendered":"https:\/\/womenhouse.cz\/?p=6356"},"modified":"2021-11-26T02:28:19","modified_gmt":"2021-11-26T01:28:19","slug":"varistor","status":"publish","type":"post","link":"https:\/\/womenhouse.cz\/index.php\/2021\/10\/30\/varistor\/","title":{"rendered":"Varistor"},"content":{"rendered":"\n<p><strong>Ochrany elektronick\u00fdch obvod\u016f a za\u0159\u00edzen\u00ed p\u0159ed nadm\u011brn\u00fdm nap\u011bt\u00edm lze dos\u00e1hnout pomoc\u00ed rezistoru s neline\u00e1rn\u00ed charakteristikou odporu z\u00e1vislou na nap\u011bt\u00ed. Tuto funkci pln\u00ed polovodi\u010dov\u00fd prvek zvan\u00fd varistor. V jak\u00fdch p\u0159\u00edpadech by se m\u011bl pou\u017e\u00edvat?<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/main_pexels-jeremy-waterhouse-3665444-1024x682.jpg\" alt=\"\" class=\"wp-image-6357\" srcset=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/main_pexels-jeremy-waterhouse-3665444-1024x682.jpg 1024w, https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/main_pexels-jeremy-waterhouse-3665444-300x200.jpg 300w, https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/main_pexels-jeremy-waterhouse-3665444-768x512.jpg 768w, https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/main_pexels-jeremy-waterhouse-3665444-730x485.jpg 730w, https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/main_pexels-jeremy-waterhouse-3665444.jpg 1280w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Co je varistor a jak funguje?<\/h2>\n\n\n\n<p>Ve varistoru se odpor m\u011bn\u00ed v z\u00e1vislosti na p\u0159ilo\u017een\u00e9m elektrick\u00e9m nap\u011bt\u00ed. P\u0159i ni\u017e\u0161\u00edch nap\u011bt\u00edch je jeho hodnota velmi vysok\u00e1. P\u0159i p\u0159ekro\u010den\u00ed mezn\u00edho nap\u011bt\u00ed odpor varistoru rychle kles\u00e1. B\u011bhem velmi kr\u00e1tk\u00e9 doby klesne hodnota z n\u011bkolika set ohm\u016f na pouh\u00fdch n\u011bkolik des\u00edtek.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.tme.eu\/cz\/katalog\/varistory_29\/\"><strong>Varistor<\/strong><\/a> se vyr\u00e1b\u011bj\u00ed sp\u00e9k\u00e1n\u00edm stla\u010den\u00fdch pr\u00e1\u0161kov\u00fdch oxid\u016f zinku, kter\u00fd p\u016fsob\u00ed jako vodi\u010d, a p\u0159\u00edm\u011bs\u00ed oxid\u016f r\u016fzn\u00fdch kov\u016f s mnohem vy\u0161\u0161\u00ed impedanc\u00ed, nap\u0159\u00edklad vizmutu. P\u0159i vy\u0161\u0161\u00edm nap\u011bt\u00ed se struktura varistoru na p\u0159echodech uspo\u0159\u00e1d\u00e1. Proud si tak najde cestu ven.<\/p>\n\n\n\n<figure class=\"wp-block-gallery columns-2 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"480\" src=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/848593_1.jpg\" alt=\"\" data-id=\"6362\" data-full-url=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/848593_1.jpg\" data-link=\"https:\/\/womenhouse.cz\/index.php\/2021\/10\/30\/varistor\/848593_1\/\" class=\"wp-image-6362\" srcset=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/848593_1.jpg 640w, https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/848593_1-300x225.jpg 300w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"480\" src=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/687582_1.jpg\" alt=\"\" data-id=\"6360\" data-full-url=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/687582_1.jpg\" data-link=\"https:\/\/womenhouse.cz\/index.php\/2021\/10\/30\/varistor\/687582_1\/\" class=\"wp-image-6360\" srcset=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/687582_1.jpg 640w, https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/687582_1-300x225.jpg 300w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/figure><\/li><\/ul><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Kde se pou\u017e\u00edvaj\u00ed varistory?<\/h2>\n\n\n\n<p>Varistory jsou vhodn\u00e9 k ochran\u011b v\u0161ech obvod\u016f a za\u0159\u00edzen\u00ed, kde hroz\u00ed riziko n\u00e1hl\u00e9ho p\u0159ep\u011bt\u00ed. P\u0159i p\u0159ep\u011bt\u00ed klesne impedance varistoru a energie impulsu zp\u016fsob\u00ed vypnut\u00ed nebo p\u0159ep\u00e1len\u00ed pojistky. Samotn\u00e9 za\u0159\u00edzen\u00ed nen\u00ed po\u0161kozeno.<\/p>\n\n\n\n<p>Pou\u017e\u00edvaj\u00ed se tak\u00e9 ve svodi\u010d\u00edch bleskov\u00fdch proud\u016f jako svodi\u010de p\u0159ep\u011bt\u00ed. Jejich n\u00edzk\u00fd odpor umo\u017e\u0148uje, aby proud z blesku voln\u011b tekl do zem\u011b. Men\u0161\u00ed varistory se tak\u00e9 zcela b\u011b\u017en\u011b pou\u017e\u00edvaj\u00ed v elektronick\u00fdch za\u0159\u00edzen\u00edch a p\u0159\u00edstroj\u00edch. Mezi dal\u0161\u00ed aplikace pat\u0159\u00ed:<\/p>\n\n\n\n<p>&#8211; ochrana veden\u00ed vysok\u00e9ho nap\u011bt\u00ed,<\/p>\n\n\n\n<p>&#8211; p\u0159ep\u011b\u0165ov\u00e9 a vysokonap\u011b\u0165ov\u00e9 ochrany (v televizorech),<\/p>\n\n\n\n<p>&#8211; ochrana transform\u00e1tor\u016f,<\/p>\n\n\n\n<p>&#8211; ochrana za\u0159\u00edzen\u00ed p\u0159ipojen\u00fdch k telefonn\u00edm link\u00e1m, v\u010detn\u011b telefon\u016f a modem\u016f,<\/p>\n\n\n\n<p>&#8211; t\u011b\u017ek\u00fd pr\u016fmysl.<\/p>\n\n\n\n<p>Varistory se vyr\u00e1b\u011bj\u00ed v \u0161irok\u00e9m rozsahu maxim\u00e1ln\u00edch provozn\u00edch nap\u011bt\u00ed, p\u0159\u00edpustn\u00fdch proud\u016f a rozm\u011br\u016f. D\u00edky tomu je lze efektivn\u011b p\u0159izp\u016fsobit r\u016fzn\u00fdm typ\u016fm projekt\u016f. V\u0161echny jsou odpov\u00eddaj\u00edc\u00edm zp\u016fsobem ozna\u010deny. Je d\u016fle\u017eit\u00e9, aby nejvy\u0161\u0161\u00ed trval\u00e9 nap\u011bt\u00ed v\u00fdrobku bylo vy\u0161\u0161\u00ed ne\u017e nap\u011bt\u00ed, kter\u00e9 na n\u011bj bude trvale p\u016fsobit.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/58311_1.jpg\" alt=\"\" class=\"wp-image-6359\" width=\"309\" height=\"232\" srcset=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/58311_1.jpg 640w, https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/58311_1-300x225.jpg 300w\" sizes=\"(max-width: 309px) 100vw, 309px\" \/><\/figure><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Jak\u00e9 typy varistor\u016f jsou v prodeji?<\/h2>\n\n\n\n<p>Varistory se mohou li\u0161it typem materi\u00e1lu a zp\u016fsobem v\u00fdroby. Mezi nejb\u011b\u017en\u011bj\u0161\u00ed typy pat\u0159\u00ed:<\/p>\n\n\n\n<ul><li>blok,<\/li><li>keramick\u00e9,<\/li><li>oxid kov\u016f,<\/li><li>oxid zine\u010dnat\u00fd.<\/li><\/ul>\n\n\n\n<p>Komer\u010dn\u011b dostupn\u00e9 varistory maj\u00ed velmi \u0161irok\u00fd rozsah hodnot z\u00e1kladn\u00edch parametr\u016f. V internetov\u00fdch obchodech, jako je tme.eu, m\u016f\u017eete zakoupit varistory s nap\u011bt\u00edm od 8 V do 1,8 kV, maxim\u00e1ln\u00edm proudem varistoru od 30 A do 70 kA a v\u00fdkonem od 5 mW do 1,6 W. D\u011bl\u00ed se tak\u00e9 podle zp\u016fsobu mont\u00e1\u017ee (SMD a THT). Rozm\u011bry se vyplat\u00ed p\u0159izp\u016fsobit va\u0161im pot\u0159eb\u00e1m, proto\u017ee i zde existuj\u00ed zna\u010dn\u00e9 rozd\u00edly.<\/p>\n\n\n\n<p>Varistory vyr\u00e1b\u00ed mnoho velk\u00fdch a renomovan\u00fdch spole\u010dnost\u00ed. Mezi nejzn\u00e1m\u011bj\u0161\u00ed pat\u0159\u00ed n\u011bmeck\u00e1 spole\u010dnost EPCOS, kter\u00e1 je sou\u010d\u00e1st\u00ed japonsk\u00e9 TDK Corporation, p\u0159edn\u00edho v\u00fdrobce elektronick\u00fdch sou\u010d\u00e1stek, americk\u00e1 korporace Littelfuse nebo celosv\u011btov\u011b uzn\u00e1van\u00fd Panasonic.&nbsp;<\/p>\n\n\n\n<p>V\u00fdb\u011br je tedy \u0161irok\u00fd a d\u00edky n\u00edzk\u00e9 cen\u011b jsou varistory nepostradatelnou sou\u010d\u00e1st\u00ed d\u00edlny ka\u017ed\u00e9ho elektronika.<\/p>\n\n\n\n<div style=\"height:48px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-gallery columns-3 is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"480\" src=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/848593_1.jpg\" alt=\"\" data-id=\"6362\" data-full-url=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/848593_1.jpg\" data-link=\"https:\/\/womenhouse.cz\/index.php\/2021\/10\/30\/varistor\/848593_1\/\" class=\"wp-image-6362\" srcset=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/848593_1.jpg 640w, https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/848593_1-300x225.jpg 300w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"480\" src=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/848431_1.jpg\" alt=\"\" data-id=\"6361\" data-full-url=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/848431_1.jpg\" data-link=\"https:\/\/womenhouse.cz\/index.php\/2021\/10\/30\/varistor\/848431_1\/\" class=\"wp-image-6361\" srcset=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/848431_1.jpg 640w, https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/848431_1-300x225.jpg 300w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"480\" src=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/687582_1.jpg\" alt=\"\" data-id=\"6360\" data-full-url=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/687582_1.jpg\" data-link=\"https:\/\/womenhouse.cz\/index.php\/2021\/10\/30\/varistor\/687582_1\/\" class=\"wp-image-6360\" srcset=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/687582_1.jpg 640w, https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/687582_1-300x225.jpg 300w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/main_pexels-jeremy-waterhouse-3665444-1-1024x682.jpg\" alt=\"\" data-id=\"6363\" data-full-url=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/main_pexels-jeremy-waterhouse-3665444-1.jpg\" data-link=\"https:\/\/womenhouse.cz\/index.php\/2021\/10\/30\/varistor\/main_pexels-jeremy-waterhouse-3665444-1\/\" class=\"wp-image-6363\" srcset=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/main_pexels-jeremy-waterhouse-3665444-1-1024x682.jpg 1024w, https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/main_pexels-jeremy-waterhouse-3665444-1-300x200.jpg 300w, https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/main_pexels-jeremy-waterhouse-3665444-1-768x512.jpg 768w, https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/main_pexels-jeremy-waterhouse-3665444-1-730x485.jpg 730w, https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/main_pexels-jeremy-waterhouse-3665444-1.jpg 1280w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"480\" src=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/58311_1.jpg\" alt=\"\" data-id=\"6359\" data-full-url=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/58311_1.jpg\" data-link=\"https:\/\/womenhouse.cz\/index.php\/2021\/10\/30\/varistor\/58311_1\/\" class=\"wp-image-6359\" srcset=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/58311_1.jpg 640w, https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/58311_1-300x225.jpg 300w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/figure><\/li><\/ul><\/figure>\n\n\n\n<p><strong>Zdroj foto:<\/strong> Tme.eu<\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Ochrany elektronick\u00fdch obvod\u016f a za\u0159\u00edzen\u00ed p\u0159ed nadm\u011brn\u00fdm nap\u011bt\u00edm lze dos\u00e1hnout pomoc\u00ed rezistoru s neline\u00e1rn\u00ed charakteristikou odporu z\u00e1vislou na nap\u011bt\u00ed. Tuto funkci pln\u00ed polovodi\u010dov\u00fd prvek zvan\u00fd varistor. V jak\u00fdch p\u0159\u00edpadech by se m\u011bl pou\u017e\u00edvat? Co je varistor a jak funguje? Ve varistoru se odpor m\u011bn\u00ed v z\u00e1vislosti na p\u0159ilo\u017een\u00e9m elektrick\u00e9m nap\u011bt\u00ed. P\u0159i ni\u017e\u0161\u00edch nap\u011bt\u00edch je jeho [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":6357,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[2,12],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Varistor - WOMENHOUSE.cz<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/womenhouse.cz\/index.php\/2021\/10\/30\/varistor\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Varistor - WOMENHOUSE.cz\" \/>\n<meta property=\"og:description\" content=\"Ochrany elektronick\u00fdch obvod\u016f a za\u0159\u00edzen\u00ed p\u0159ed nadm\u011brn\u00fdm nap\u011bt\u00edm lze dos\u00e1hnout pomoc\u00ed rezistoru s neline\u00e1rn\u00ed charakteristikou odporu z\u00e1vislou na nap\u011bt\u00ed. Tuto funkci pln\u00ed polovodi\u010dov\u00fd prvek zvan\u00fd varistor. V jak\u00fdch p\u0159\u00edpadech by se m\u011bl pou\u017e\u00edvat? Co je varistor a jak funguje? Ve varistoru se odpor m\u011bn\u00ed v z\u00e1vislosti na p\u0159ilo\u017een\u00e9m elektrick\u00e9m nap\u011bt\u00ed. P\u0159i ni\u017e\u0161\u00edch nap\u011bt\u00edch je jeho [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/womenhouse.cz\/index.php\/2021\/10\/30\/varistor\/\" \/>\n<meta property=\"og:site_name\" content=\"WOMENHOUSE.cz\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/womenhousecz\" \/>\n<meta property=\"article:published_time\" content=\"2021-10-29T23:26:02+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-11-26T01:28:19+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/womenhouse.cz\/wp-content\/uploads\/2021\/10\/main_pexels-jeremy-waterhouse-3665444.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t<meta property=\"og:image:height\" content=\"853\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Miroslav Van\u011bk\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Napsal(a)\" \/>\n\t<meta name=\"twitter:data1\" content=\"Miroslav Van\u011bk\" \/>\n\t<meta name=\"twitter:label2\" content=\"Odhadovan\u00e1 doba \u010dten\u00ed\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minuty\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/womenhouse.cz\/index.php\/2021\/10\/30\/varistor\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/womenhouse.cz\/index.php\/2021\/10\/30\/varistor\/\"},\"author\":{\"name\":\"Miroslav Van\u011bk\",\"@id\":\"https:\/\/womenhouse.cz\/#\/schema\/person\/86cffd1f6a5059d13fa66315493f584d\"},\"headline\":\"Varistor\",\"datePublished\":\"2021-10-29T23:26:02+00:00\",\"dateModified\":\"2021-11-26T01:28:19+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/womenhouse.cz\/index.php\/2021\/10\/30\/varistor\/\"},\"wordCount\":584,\"publisher\":{\"@id\":\"https:\/\/womenhouse.cz\/#organization\"},\"articleSection\":[\"NEWS\",\"TIPY &amp; 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