[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-562840-105":59,"doc-detail-562840-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","db3db4-diac-electrical-characteristics-and-product-selector","DB3/DB4 Diac - Electrical Characteristics and Product Selector","","DB3/DB4 diac devices are described as fixed-voltage trigger diodes used with triacs for simplified gate control or as starting elements in fluorescent lamp ballasts. A surface-mount SOT-23 option (SMDB3) is provided for reduced footprint and compatibility with pick-and-place equipment. The document lists absolute maximum ratings, including repetitive peak on-state current and junction/storage temperature ranges, plus electrical characteristics such as breakover voltage, symmetry, dynamic breakover voltage, output voltage, breakover current, rise time, and leakage/peak currents. Product selection by part number, package, and marking is included.",{"@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/db3db4-diac-electrical-characteristics-and-product-selector/562840/",{"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/db3db4-diac-electrical-characteristics-and-product-selector/562840.png","ImageObject",300,407,{"name":92,"@type":93},"ahduag","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-14","2026-10-12",true,{"@type":102,"interactionType":103,"userInteractionCount":19},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What are the DB3/DB4 diac devices used for?","Question",{"text":112,"@type":113},"They function as trigger diodes with a fixed voltage reference. They can be used with triacs for simplified gate control or as starting elements in fluorescent lamp ballasts.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What is the breakover voltage range for SMDB3, DB3, and DB4?",{"text":117,"@type":113},"SMDB3 and DB3 have a breakover voltage range of 28–36 V, while DB4 ranges from 35–45 V, as shown in the product selector.",{"name":119,"@type":110,"acceptedAnswer":120},"Which packages are available for the DB3/DB4 family?",{"text":121,"@type":113},"DB3 and DB4 are in DO-35 packages, and the surface-mount version SMDB3 is available in SOT-23.","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},562840,1791879819,{"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":19,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":24,"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},3985747870414,"https://ap-avatar.wpscdn.com/davatar_9964176cb1d06d4a9deccf72a44ae3dc","|   ® \u003Cbr>| DB3 DB4 SMDB3 |\n| --- | --- |\n| DIAC |  |\n\nFEATURES  \n■ V BO : 32V and 40V  \nLOW BREAKOVER CURRENT  \n■  \nDESCRIPTION  \nFunctioning as a trigger diode with a fixed voltage reference, the DB3/DB4 series can be used in conjunction with triacs for simplified gate control circuits or as a starting element in fluorenscent lamp ballasts.  \nA new surface mount version is now available in SOT-23 package, providing reduced space and compatibility with automatic pick and place equipment.  \nDO-35  \n(DB3 and DB4)  \nSOT-23  \n(SMDB3)*  \nPin 1 and 3 must be shorted  \ntogether  \nABSOLUTE MAXIMUM RATINGS (limiting values)  \n\n| Symbol | Parameter |  | Value | Unit |\n| --- | --- | --- | --- | --- |\n| I TRM | Repetitive peak on-state current tp = 20 µs F= 120 Hz | SMDB3 | 1.00 | A |\n|  |  | DB3 / DB4 | 2.00 |  |\n| Tstg\u003Cbr>Tj | Storage temperature range\u003Cbr>Operating junction temperature range |  | -40 to + 125 | °C |\n\nNote: * SMDB3 indicated as Preliminary spec as product is still in development stage.  \nOctober 2001-Ed: 2B 1/5  \nELECTRICAL CHARACTERISTICS (Tj = 25°C unless otherwise specified)  \n\n| Symbol | Parameter | Test Conditions |  | SMDB3 | DB3 | DB4 | Unit |\n| --- | --- | --- | --- | --- | --- | --- | --- |\n| V BO | Breakover voltage * | C = 22nF ** | MIN. | 28 | 28 | 35 | V |\n|  |  |  | TYP. | 32 | 32 | 40 |  |\n|  |  |  | MAX. | 36 | 36 | 45 |  |\n| I V BO1-V BO2 I | Breakover voltage symmetry | C = 22nF ** | MAX. | 3 |  |  | V |\n| ∆ V | Dynamic breakover voltage * | V BO and V F at 10mA | MIN. | 10 | 5 |  | V |\n| VO | Output voltage * | see diagram 2\u003Cbr>(R=20Ω) | MIN. | 10 | 5 |  | V |\n| I BO | Breakover current * | C = 22nF ** | MAX. | 10 | 50 |  | µA |\n| tr | Rise time * | see diagram 3 | MAX. | 0.50 | 2 |  | µs |\n| IR | Leakage current * | VR = 0 .5 VBO max | MAX. | 1 | 10 |  | µA |\n| IP | Peak current * | see diagram 2 (Gate) | MIN. | 1 | 0.30 |  | A |\n\n* Applicable to both forward and reverse directions.  \n** Connected in parallel to the device.  \nPRODUCT SELECTOR  \n\n| Part Number | V BO | Package |\n| --- | --- | --- |\n| SMDB3 | 28-36 | SOT-23 |\n| DB3 | 28-36 | DO-35 |\n| DB4 | 35-45 | DO-35 |\n\nORDERING INFORMATION  \n\n| SM DB 3 |\n| --- |\n| Surface Mount   Version\u003Cbr>\u003Cbr>\u003Cbr> Breakover voltage\u003Cbr>3: VBO typ = 32V\u003Cbr>4: VBO typ = 40V |\n| Diac Series |\n\n2/5  \nOTHER INFORMATION  \n\n| Part Number | Marking | Weight | Base Quantity | Packing Mode |\n| --- | --- | --- | --- | --- |\n| SMDB3 | DB3 | 0.01 g | 3000 | Tape & Reel |\n| DB3 | DB3 (Blue Body Coat) | 0.15 g | 5000 | Tape & Reel |\n| DB4 | DB4 (Blue Body Coat) | 0.15 g | 5000 | Tape & Reel |\n\nDiagram 1: Voltage-current characteristic curve.  \n\n| 10mA\u003Cbr>IBO-V I B | |\n| --- | --- |\n| |  0,5 V BO   V \u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>VF VBO\u003Cbr>- IF |\n\nDiagram 2: Test circuit.  \n10 kΩ 500 kΩ D. U.T Rs=0  \n220 V  \n50 Hz  \nC=0.1µF  \nIP  \nR=20 Ω  \nDiagram 3: Rise time measurement.  \n3/5  \nFig. 1: Relative variation of VBO versus junction temperature (typical values) .  \nVBO [Tj] / VBO [Tj=25°C]  \n1.10 1.05 1.00 0.95 0.90 0.85  \n0.80  \n\n|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n|  |  |  |  |  |  |  |  |  | D | B3/DB4 |  |  |  | | |  | |  |  |\n|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n| | | |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |  |  |  |  |  |  | SMD | B3 |  |  |  |  |  |\n|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |  |  | Tj( | C) |  |  |  |  |  |  |  |  |  |\n\n25 50 75 100 125  \nFig. 2: Repetitive peak ","cbCailhyXI0YGvwB","https://ap.wps.com/l/cbCailhyXI0YGvwB","pdf",61210,"English","# Features and Description\n## Absolute Maximum Ratings\n## Electrical Characteristics\n## Product Selector\n## Ordering Information\n## Diagrams and Mechanical Data","[{\"question\":\"What are the DB3/DB4 diac devices used for?\",\"answer\":\"They function as trigger diodes with a fixed voltage reference. They can be used with triacs for simplified gate control or as starting elements in fluorescent lamp ballasts.\"},{\"question\":\"What is the breakover voltage range for SMDB3, DB3, and DB4?\",\"answer\":\"SMDB3 and DB3 have a breakover voltage range of 28–36 V, while DB4 ranges from 35–45 V, as shown in the product selector.\"},{\"question\":\"Which packages are available for the DB3/DB4 family?\",\"answer\":\"DB3 and DB4 are in DO-35 packages, and the surface-mount version SMDB3 is available in SOT-23.\"}]","DB3/DB4 Diac - Electrical Characteristics and Product Selector | PDF",1791809856,13]