[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-561085-105":59,"doc-detail-561085-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","discrete-semiconductors-npn-high-voltage-transistors-bf420-technical-data-sheet","DISCRETE SEMICONDUCTORS - NPN high-voltage transistors BF420 - Technical data sheet","","Product specification for NPN high-voltage transistors BF420 and BF422, describing their key electrical characteristics, limiting values, and thermal performance in a TO-92 plastic package with three leads. Emphasis is placed on low feedback capacitance and suitability for Class-B video output stages used in colour television and professional monitor equipment. Includes DC current gain, saturation voltage, feedback capacitance, transition frequency, operating temperatures, and thermal resistance from junction to ambient, along with ordering and pinning information.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/discrete-semiconductors-npn-high-voltage-transistors-bf420-technical-data-sheet/561085/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/discrete-semiconductors-npn-high-voltage-transistors-bf420-technical-data-sheet/561085.png","ImageObject",300,407,{"name":92,"@type":93},"Stanley","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-21","2026-10-12",true,{"@type":102,"interactionType":103,"userInteractionCount":29},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What are the main features of BF420 and BF422?","Question",{"text":112,"@type":113},"They are NPN high-voltage transistors with low feedback capacitance, provided in a TO-92 plastic package with three leads.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What applications are specified for these transistors?",{"text":117,"@type":113},"They are intended for Class-B video output stages in colour television and professional monitor equipment.",{"name":119,"@type":110,"acceptedAnswer":120},"What limiting values and thermal parameters are given?",{"text":121,"@type":113},"The document lists maximum collector-base and collector-emitter voltages, maximum currents and power dissipation, storage and junction temperatures, and thermal resistance Rth(j-a) from junction to ambient.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},561085,1791839343,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":29,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":29,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144},2336477405376,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","DISCRETE SEMICONDUCTORS  \n\n| DATA SHEET |  |\n| --- | --- |\n| | |\n| BF420; BF422\u003Cbr>NPN high-voltage transistors |  |\n\nProduct specification  \nSupersedes data of 1996 Dec 09  \n2004 Nov 10  \nNPN high-voltage transistors BF420; BF422  \nFEATURES  \n• Low feedback capacitance.  \nAPPLICATIONS  \n• Class-B video output stages in colour television and professional monitor equipment.  \nDESCRIPTION  \nNPN transistors in a TO-92 plastic package.  \nPNP complements: BF421 and BF423 .  \nORDERING INFORMATION  \nPINNING  \n\n| PIN | DESCRIPTION |\n| --- | --- |\n| 1 | base |\n| 2 | collector |\n| 3 | emitter |\n\n\n| \u003Cbr>| 1\u003Cbr>\u003Cbr>\u003Cbr>2\u003Cbr>3 |\n| --- | --- |\n| MAM259 |  |\n| Fig. 1 Simplified outline (TO-92) and symbol. |  |\n\n\n| TYPE NUMBER | PACKAGE |  |  |\n| --- | --- | --- | --- |\n|  | NAME | DESCRIPTION | VERSION |\n| BF420 | SC-43A | plastic single-ended leaded (through hole) package; 3 leads | SOT54 |\n| BF422 |  |  |  |\n\nQUICK REFERENCE DATA  \n\n| SYMBOL | PARAMETER | CONDITIONS | MIN. | MAX. | UNIT |\n| --- | --- | --- | --- | --- | --- |\n| VCBO | collector-base voltage BF420\u003Cbr>BF422 | open emitter | −\u003Cbr>− | 300\u003Cbr>250 | V\u003Cbr>V |\n| V CEO | collector-emitter voltage BF420\u003Cbr>BF422 | open base | −\u003Cbr>− | 300\u003Cbr>250 | V\u003Cbr>V |\n| I CM | peak collector current |  | − | 100 | mA |\n| Ptot | total power dissipation | Tamb ≤ 25 °C | − | 830 | mW |\n| h FE | DC current gain | VCE = 20 V; IC = 25 mA | 50 | − |  |\n| Cre | feedback capacitance | VCE = 30 V; IC = ic = 0 A; f = 1 MHz | − | 1.6 | pF |\n| fT | transition frequency | VCE = 10 V; IC = 10 mA; f = 100 MHz | 60 | − | MHz |\n\n2004 Nov 10 2  \nNPN high-voltage transistors BF420; BF422  \nLIMITING VALUES  \nIn accordance with the Absolute Maximum Rating System (IEC 60134) .  \n\n| SYMBOL | PARAMETER | CONDITIONS | MIN. | MAX. | UNIT |\n| --- | --- | --- | --- | --- | --- |\n| VCBO | collector-base voltage\u003Cbr>BF420\u003Cbr>BF422 | open emitter | −\u003Cbr>− | 300\u003Cbr>250 | V\u003Cbr>V |\n| V CEO | collector-emitter voltage\u003Cbr>BF420\u003Cbr>BF422 | open base | −\u003Cbr>− | 300\u003Cbr>250 | V\u003Cbr>V |\n| VEBO | emitter-base voltage | open collector | − | 5 | V |\n| IC | collector current (DC) |  | − | 50 | mA |\n| I CM | peak collector current |  | − | 100 | mA |\n| IBM | peak base current |  | − | 50 | mA |\n| Ptot | total power dissipation | Tamb ≤ 25 °C; note 1 | − | 830 | mW |\n| Tstg | storage temperature |  | −65 | +150 | °C |\n| Tj | junction temperature |  | − | 150 | °C |\n| Tamb | ambient temperature |  | −65 | +150 | °C |\n\nNote  \n1. Transistor mounted on a printed-circuit board.  \nTHERMAL CHARACTERISTICS  \n\n| SYMBOL | PARAMETER | CONDITIONS | VALUE | UNIT |\n| --- | --- | --- | --- | --- |\n| Rth(j-a) | thermal resistance from junction to ambient | note 1 | 150 | K/W |\n\nNote  \n1. Transistor mounted on a printed-circuit board.  \nCHARACTERISTICS  \nTamb = 25 °C unless otherwise specified.  \n\n| SYMBOL | PARAMETER | CONDITIONS | MIN. | MAX. | UNIT |\n| --- | --- | --- | --- | --- | --- |\n| ICBO | collector-base cut-off current | V CB = 200 V; IE = 0 A | − | 10 | nA |\n|  |  | V CB = 200 V; IE = 0 A; Tj = 150 °C | − | 10 | µA |\n| IEBO | emitter-base cut-off current | VEB = 5 V; IC = 0 A | − | 50 | nA |\n| h FE | DC current gain | VCE = 20 V; IC = 25 mA | 50 | − |  |\n| VCEsat | collector-emitter saturation voltage | IC = 30 mA; IB = 5 mA | − | 0.6 | V |\n| Cre | feedback capacitance | VCE = 30 V; IC = ic = 0 A; f = 1 MHz | − | 1.6 | pF |\n| fT | transition frequency | VCE = 10 V; IC = 10 mA; f = 100 MHz | 60 | − | MHz |\n\n2004 Nov 10 3  \nPhilips Semiconductors Product specification  \n\n| NPN high-voltage transistors | BF420; BF422 |\n| --- | --- |\n\nPACKAGE OUTLINE  \nPlastic single-ended leaded (through hole) package; 3 leads SOT54  \n0 2.5 5 mm  \nscale  \nDIMENSIONS (mm are the original dimensions)  \n\n| UNIT | A | b | b1 | c | D | d | E | e | e1 | L | L1(1)\u003Cbr>max. |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n| mm | 5.2\u003Cbr>5.0 | 0.48\u003Cbr>0.40 | 0.66\u003Cbr>0.55 | 0.45\u003Cbr>0.38 | 4.8\u003Cbr>4.4 | 1.7\u003Cbr>1.4 | 4.2\u003Cbr>3.6 | 2.54 | 1.27 | 14.5\u003Cbr>12.7 | ","cbCaihU4mYnC1Uqz","https://ap.wps.com/l/cbCaihU4mYnC1Uqz","pdf",53042,"English","# Features\n# Applications\n# Description\n# Ordering information\n## Pinning\n## Type number and package\n# Quick reference data\n# Limiting values\n# Thermal characteristics\n# Characteristics\n# Package outline\n# Data sheet status","[{\"question\":\"What are the main features of BF420 and BF422?\",\"answer\":\"They are NPN high-voltage transistors with low feedback capacitance, provided in a TO-92 plastic package with three leads.\"},{\"question\":\"What applications are specified for these transistors?\",\"answer\":\"They are intended for Class-B video output stages in colour television and professional monitor equipment.\"},{\"question\":\"What limiting values and thermal parameters are given?\",\"answer\":\"The document lists maximum collector-base and collector-emitter voltages, maximum currents and power dissipation, storage and junction temperatures, and thermal resistance Rth(j-a) from junction to ambient.\"}]","DISCRETE SEMICONDUCTORS - NPN high-voltage transistors BF420 - Technical data sheet | PDF",1791804964,15]