{"id":74409,"date":"2023-12-17T14:00:24","date_gmt":"2023-12-17T13:00:24","guid":{"rendered":"https:\/\/botland.com.pl\/blog\/irf-4905-co-to-jest-dane-techniczne-cena-i-opinie\/"},"modified":"2026-04-08T11:02:26","modified_gmt":"2026-04-08T09:02:26","slug":"irf-4905-co-je-to-technicke-udaje-cena-a-nazory","status":"publish","type":"post","link":"https:\/\/botland.cz\/blog\/irf-4905-co-je-to-technicke-udaje-cena-a-nazory\/","title":{"rendered":"IRF 4905 – Co je to? Technick\u00e9 \u00fadaje, cena a n\u00e1zory"},"content":{"rendered":"\u010cas \u010dten\u00ed:<\/span> 3<\/span> min.<\/span><\/span>\t\t
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IRF 4905 je zkr\u00e1cen\u00fd n\u00e1zev tranzistoru MOSFET, kter\u00fd se vyzna\u010duje extr\u00e9mn\u011b n\u00edzk\u00fdm odporem a okam\u017eit\u00fdm sp\u00edn\u00e1n\u00edm.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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IRF 4905 - co to je?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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IRF 4905 MOSFET<\/strong><\/a> je elektronick\u00e1 sou\u010d\u00e1stka se t\u0159emi v\u00fdvody v podob\u011b dr\u00e1tov\u00fdch patek, ur\u010den\u00e1 pro mont\u00e1\u017e THT. Vynik\u00e1 vysok\u00fdm v\u00fdkonem, spolehlivost\u00ed a univerz\u00e1ln\u00edm pou\u017eit\u00edm. Unipol\u00e1rn\u00ed tranzistor<\/a> s ozna\u010den\u00edm IRF 4905<\/strong> se vyzna\u010duje sm\u011brem veden\u00ed P-MOSFET<\/strong><\/a>. Princip tranzistor\u016f typu P (P-kan\u00e1l) spo\u010d\u00edv\u00e1 v pou\u017eit\u00ed d\u011br, kter\u00e9 jsou nositeli n\u00e1boje. Na opl\u00e1tku MOSFET s kan\u00e1lem typu N<\/strong><\/a> vyu\u017e\u00edv\u00e1 jako nosi\u010de n\u00e1boje elektrony.<\/p>

Zapnut\u00ed P-kan\u00e1lov\u00e9ho tranzistoru<\/strong>, tj. jeho uveden\u00ed do stavu, kdy tato elektronick\u00e1 sou\u010d\u00e1stka za\u010dne v\u00e9st proud mezi zdrojem a hradlem, vy\u017eaduje z\u00e1porn\u00e9 nap\u011bt\u00ed (v\u016f\u010di zemi). Unipol\u00e1rn\u00ed tranzistory se pou\u017e\u00edvaj\u00ed mimo jin\u00e9 jako kl\u00ed\u010dovac\u00ed sou\u010d\u00e1stky, tj. sou\u010d\u00e1stky zodpov\u011bdn\u00e9 za sp\u00edn\u00e1n\u00ed a zesilov\u00e1n\u00ed prvk\u016f. Unipol\u00e1rn\u00ed tranzistor IRF 4905 se pou\u017e\u00edv\u00e1 v r\u016fzn\u00fdch DIY projektech, v\u010detn\u011b audio zesilova\u010d\u016f a m\u011bni\u010d\u016f nap\u011bt\u00ed.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Co je to MOSFET?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Tranzistory MOSFET<\/strong><\/a> (z anglick\u00e9ho Metal-Oxide Semiconductor Field-Effect Transistor) jsou obl\u00edben\u00e9 elektronick\u00e9 sou\u010d\u00e1stky<\/strong>, kter\u00e9 se pou\u017e\u00edvaj\u00ed k p\u0159esn\u00e9mu ovl\u00e1d\u00e1n\u00ed p\u0159ipojen\u00fdch za\u0159\u00edzen\u00ed. Konstrukce a vlastnosti tranzistoru MOSFET umo\u017e\u0148uj\u00ed bezpe\u010dn\u00e9 \u0159\u00edzen\u00ed proudov\u00fdch spot\u0159ebi\u010d\u016f, kter\u00e9 ke sv\u00e9mu provozu pot\u0159ebuj\u00ed velk\u00e9 mno\u017estv\u00ed elektrick\u00e9 energie. Hlavn\u00ed v\u00fdhodou tranzistor\u016f MOSFET je mo\u017enost ovl\u00e1dat p\u0159ipojen\u00e1 za\u0159\u00edzen\u00ed pomoc\u00ed mal\u00e9ho sign\u00e1lu.<\/strong><\/p>\n

MOSFET za\u010dne v\u00e9st, kdy\u017e nap\u011bt\u00ed na hradle a zdroji p\u0159ekro\u010d\u00ed tzv. prahov\u00e9 nap\u011bt\u00ed<\/strong>. Tento parametr se m\u016f\u017ee li\u0161it v z\u00e1vislosti na konkr\u00e9tn\u00edm tranzistoru. N\u011bkte\u0159\u00ed v\u00fdrobci MOSFET\u016f uv\u00e1d\u011bj\u00ed v popisech sv\u00fdch v\u00fdrobk\u016f prahov\u00e9 nap\u011bt\u00ed se zkratkou UT. IRF4905 pat\u0159\u00ed do skupiny tranzistor\u016f HEXFET<\/strong>, kter\u00e9 se vyzna\u010duj\u00ed nadpr\u016fm\u011brn\u00fdm v\u00fdkonem. Unipol\u00e1rn\u00ed polarizace tranzistoru MOSFET znamen\u00e1, \u017ee cel\u00fd \u0159\u00eddic\u00ed proces prob\u00edh\u00e1 pomoc\u00ed jedin\u00e9 nosn\u00e9 n\u00e1boje.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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P-MOSFET IRF4905 tranzistor -55V\/-74A - THT.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tPOD\u00cdVEJTE SE NA<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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IRF 4905 - technick\u00e1 data<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Unipol\u00e1rn\u00ed tranzistor s kan\u00e1lem typu P<\/strong><\/a> se vyzna\u010duje proudem na odtoku 74 A<\/strong>. Naopak nap\u011bt\u00ed drain-source je 55 V<\/strong>. Dal\u0161\u00edm technick\u00fdm parametrem je odpor tranzistoru, kdy\u017e je sou\u010d\u00e1stka ve vodiv\u00e9m stavu. Tento parametr se rovn\u00e1 20 mohm<\/strong>. Na druhou stranu, rozpt\u00fdlen\u00fd v\u00fdkon \u010din\u00ed 200 W<\/strong>. Maxim\u00e1ln\u00ed v\u00fdkon je mo\u017en\u00fd pouze tehdy, kdy\u017e MOSFET pracuje v rozsahu provozn\u00edch teplot.<\/p>

Unipol\u00e1rn\u00ed tranzistor IRF 4905<\/strong><\/a> je vyroben v souladu s normou RoHS, kter\u00e1 byla v Evropsk\u00e9 unii zavedena v roce 2003. C\u00edlem sm\u011brnice RoHS je co nejv\u00edce omezit nebezpe\u010dn\u00e9 l\u00e1tky, kter\u00e9 mohou potenci\u00e1ln\u011b unikat do \u017eivotn\u00edho prost\u0159ed\u00ed, v\u010detn\u011b elektronick\u00fdch za\u0159\u00edzen\u00ed a sou\u010d\u00e1stek. Tranzistor IRF 4905 je navr\u017een pro stabiln\u00ed provoz v \u0161irok\u00e9m rozsahu provozn\u00edch teplot od -55 \u2103 do +175 \u2103<\/strong>. Popisovan\u00fd MOSFET je uzav\u0159en ve standardn\u00edm krytu TO220AB<\/strong>, kter\u00fd zaji\u0161\u0165uje nejen \u00fa\u010dinn\u00e9 chlazen\u00ed, ale tak\u00e9 snadnou mont\u00e1\u017e.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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IRF 4905 - THT p\u00e1jen\u00ed<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Popsan\u00fd unipol\u00e1rn\u00ed tranzistor je ur\u010den pro p\u00e1jen\u00ed skrz otvory (THT)<\/strong>. P\u0159i p\u00e1jen\u00ed by teplota nem\u011bla p\u0159ekro\u010dit 300 \u2103<\/strong>. Naproti tomu maxim\u00e1ln\u00ed doba oh\u0159evu je 10 sekund<\/strong>. Dobrou volbou je p\u00e1jec\u00ed spoj o pr\u016fm\u011bru p\u0159ibli\u017en\u011b 1,6 mm<\/strong>. Instalaci sou\u010d\u00e1sti lze prov\u00e9st pomoc\u00ed \u0161roubu velikosti M3<\/strong>. \u0160roub by m\u011bl b\u00fdt uta\u017een momentem 1,1 N<\/strong>.<\/p>\n

Pro jednoduch\u00e9 projekty typu “ud\u011blej si s\u00e1m” m\u00e1 smysl pou\u017e\u00edvat univerz\u00e1ln\u00ed desky plo\u0161n\u00fdch spoj\u016f DPS<\/strong><\/a>. Sestaven\u00ed tranzistoru spo\u010d\u00edv\u00e1 v provle\u010den\u00ed vodi\u010d\u016f otvory v desce. V\u00fdvody (no\u017ei\u010dky dr\u00e1t\u016f) je pak t\u0159eba p\u0159ip\u00e1jet k p\u00e1jec\u00edm pol\u00edm, kter\u00e1 jsou p\u0159ipojena k vodiv\u00fdm cest\u00e1m. P\u00e1jec\u00ed pole desky plo\u0161n\u00fdch spoj\u016f jsou vyrobena z materi\u00e1lu, kter\u00fd usnad\u0148uje p\u00e1jen\u00ed.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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IRF 4905 - n\u00e1zory<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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N\u00e1zory na unipol\u00e1rn\u00ed kan\u00e1lov\u00fd tranzistor typu P jsou pozitivn\u00ed jak mezi profesion\u00e1ln\u00edmi elektroniky, tak mezi dom\u00e1c\u00edmi kutily, a to i d\u00edky snadn\u00e9 instalaci a univerz\u00e1ln\u00ed pou\u017eitelnosti. Dal\u0161\u00ed pozitivn\u00ed zp\u011btn\u00e1 vazba je mimo jin\u00e9 zp\u016fsobena \u0161irok\u00fdm rozsahem pracovn\u00edch teplot, a tedy stabiln\u00edm provozem za r\u016fzn\u00fdch podm\u00ednek. Tranzistor je relativn\u011b levn\u00fd, tak\u017ee je dostupn\u00fd prakticky ka\u017ed\u00e9mu, kdo si chce vyrobit nap\u0159\u00edklad jednoduch\u00fd zesilova\u010d zvuku.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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IRF 4905 - cena<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Cena unipol\u00e1rn\u00edho tranzistoru IRF 4905<\/a> z\u00e1vis\u00ed nejen na konkr\u00e9tn\u00edm prodejci, ale tak\u00e9 na po\u010dtu objednan\u00fdch kus\u016f a na cen\u011b dopravy. Vybran\u00e9 obchody uplat\u0148uj\u00ed cenov\u00e9 slevy na hromadn\u00e9 objedn\u00e1vky elektronick\u00fdch sou\u010d\u00e1stek. Pokud si koup\u00edte nap\u0159\u00edklad 500 nebo v\u00edce unipol\u00e1rn\u00edch tranzistor\u016f IRF 4905, m\u016f\u017eete naj\u00edt mnohem ni\u017e\u0161\u00ed nab\u00eddky, nap\u0159. za p\u0159ibli\u017en\u011b 30 korun.<\/p>

V obou p\u0159\u00edpadech nen\u00ed cena P-kan\u00e1lov\u00e9ho MOSFETu p\u0159\u00edli\u0161 vysok\u00e1. U\u017eivatel na opl\u00e1tku z\u00edsk\u00e1 osv\u011bd\u010den\u00fd v\u00fdkonn\u00fd tranzistor.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

IRF 4905 je zkr\u00e1cen\u00fd n\u00e1zev tranzistoru MOSFET, kter\u00fd se vyzna\u010duje extr\u00e9mn\u011b n\u00edzk\u00fdm odporem a okam\u017eit\u00fdm sp\u00edn\u00e1n\u00edm.<\/p>\n","protected":false},"author":21,"featured_media":74105,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[7,179],"tags":[],"class_list":["post-74409","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-elektronika","category-kompendium"],"acf":[],"yoast_head":"\nIRF 4905 - Co je to? Technick\u00e9 \u00fadaje, cena a n\u00e1zory - Botland<\/title>\n<meta name=\"description\" content=\"IRF 4905 P-MOSFET unipol\u00e1rn\u00ed tranzistor. Pou\u017eit\u00ed, technick\u00e9 \u00fadaje, recenze a cena. 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