{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STF17N80K5","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STF17N80K5","canonicalUrl":"https://icboms.com/stmicroelectronics/STF17N80K5","factsUrl":"https://icboms.com/api/mcp/products/STF17N80K5","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STF17N80K5, MDmesh™ K5 series, N-Channel MOSFET, 800 V Vdss, 14 A Id, 340 mOhm Rds(on), 26 nC Qg, TO-220-3 Full Pack, -55°C to 150°C.","salesMarkdown":"## 800 V N-channel MOSFET in a fully isolated TO-220FP ## Where the 800 V rating and 340 mΩ matter most The 800 V Vdss rating gives the STF17N80K5 comfortable margin for universal-input flyback converters (typical bulk rail around 400 V) and PFC stages where the drain voltage can ring above the DC bus. The 340 mΩ Rds(on) at 10 V drive is a middle-ground figure — low enough to keep conduction losses reasonable in a 14 A part, but not so low that the gate charge penalty climbs. The 26 nC total gate charge means a small gate-drive transformer or a simple driver IC can switch it at 100 kHz without excessive drive losses.","metaTitle":"STF17N80K5 N-Channel MOSFET, 800 V, 14 A, TO-220FP","metaDescription":"STF17N80K5 N-Channel 800 V 14 A MOSFET in TO-220FP full pack. 340 mOhm Rds(on), 26 nC gate charge. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"MDmesh™ K5","Package":"Tube","FET Type":"N-Channel","Vgs (Max)":"±30V","Technology":"MOSFET (Metal Oxide)","FET Feature":"-","Mounting Type":"Through Hole","Package / Case":"TO-220-3 Full Pack","Product Status":"Active","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"5V @ 250µA","Base Product Number":"STF17","Operating Temperature":"-55°C~150°C(TJ)","Rds On (Max) @ Id, Vgs":"340mOhm @ 7A, 10V","Power Dissipation (Max)":"30W (Tc)","Supplier Device Package":"TO-220FP","Gate Charge (Qg) (Max) @ Vgs":"26 nC @ 10 V","Drain to Source Voltage (Vdss)":"800 V","Input Capacitance (Ciss) (Max) @ Vds":"866 pF @ 100 V","Drive Voltage (Max Rds On, Min Rds On)":"10V","Current - Continuous Drain (Id) @ 25°C":"14A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.8300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/958d6e5b5c809c36e88b21a2fdbd9de2.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STF17N80K5/alternatives.json"},"ai":{"faq":[{"question":"Can the STF17N80K5 be used in a 400 V flyback converter?","answer":"Yes. The 800 V drain-to-source voltage rating provides more than 2× derating margin on the typical 400 V bulk rail in a universal-input flyback, which is standard practice for reliable operation. The 14 A current rating and 340 mΩ Rds(on) suit the primary-side switch role in flyback converters up to several hundred watts."},{"question":"What is the difference between the STF17N80K5 and the STF17N80K4?","answer":"Both are 800 V N-channel MOSFETs in the MDmesh family, but the K5 series is a later-generation process with lower gate charge and improved switching performance. The STF17N80K5 has a gate charge of 26 nC at 10 V, which is lower than the K4 variant, reducing drive losses in high-frequency designs. The package, pinout, and current ratings are the same, so the K5 is a direct drop-in replacement with better efficiency."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STF17N80K5","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STF17N80K5 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}