{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STF12NK80Z","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STF12NK80Z","canonicalUrl":"https://icboms.com/stmicroelectronics/STF12NK80Z","factsUrl":"https://icboms.com/api/mcp/products/STF12NK80Z","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SuperMESH™ series, STF12NK80Z, N-Channel MOSFET (Metal Oxide), 800V Vdss, 10.5A Id @ 25°C, 750mΩ Rds(on) @ 5.25A/10V, 87 nC Qg, TO-220-3 Full Pack, Through Hole, -55°C~150°C TJ.","salesMarkdown":"## 800 V N-channel SuperMESH™ MOSFET in the TO-220FP isolated package The STMicroelectronics STF12NK80Z is an 800 V N-channel power MOSFET from the SuperMESH™ series, built with a strip-layout vertical DMOS process that delivers a favorable figure of merit between on-resistance and gate charge. It is designed for high-voltage switching applications such as offline flyback converters, power-factor-correction (PFC) stages, and auxiliary power supplies where 800 V breakdown margin is needed to handle reflected voltage and line surges. ## Rds(on) at junction temperature — the real loss number That figure is at 25°C junction temperature. At a typical operating junction of 125°C, the on-resistance roughly doubles — expect around 1.5 Ω. This matters for the conduction-loss line item in the SMPS loss budget: the 750 mΩ headline is the starting point, not the design value. For a typical 100 kHz hard-switched flyback, the gate-drive power requirement is roughly Qg × Vgs × fsw = 87 nC × 10 V × 100 kHz ≈ 87 mW — comfortable for a standard MOSFET driver IC but worth checking if the driver is a low-current auxiliary winding supply. The gate threshold voltage (Vgs(th)) has a maximum of 4.5 V at 100 µA, which means the device starts to turn on near 3–4 V; ensure the gate-drive pull-down holds the gate below 3 V during off-time to avoid shoot-through or partial conduction. ## Thermal derating and the TO-220FP package The continuous drain current rating of 10.5 A at 25°C case derates with temperature. The through-hole mounting (TO-220-3) is straightforward for hand-assembly or wave-solder production. For BOM continuity, the base product number STF12 covers the family; the suffix encodes the voltage and current grade.","metaTitle":"STF12NK80Z N-Channel MOSFET, 800V, 10.5A, TO-220FP","metaDescription":"STMicroelectronics STF12NK80Z N-channel SuperMESH™ MOSFET, 800V Vdss, 10.5A Id, 750mΩ Rds(on), TO-220FP.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"SuperMESH™","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":"4.5V @ 100µA","Base Product Number":"STF12","Operating Temperature":"-55°C~150°C(TJ)","Rds On (Max) @ Id, Vgs":"750mOhm @ 5.25A, 10V","Power Dissipation (Max)":"40W (Tc)","Supplier Device Package":"TO-220FP","Gate Charge (Qg) (Max) @ Vgs":"87 nC @ 10 V","Drain to Source Voltage (Vdss)":"800 V","Input Capacitance (Ciss) (Max) @ Vds":"2620 pF @ 25 V","Drive Voltage (Max Rds On, Min Rds On)":"10V","Current - Continuous Drain (Id) @ 25°C":"10.5A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.2827","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/5db3d8d988d4eae8ae7f0b54c9ea04b8.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the Rds(on) and voltage rating of STF12NK80Z?","answer":"The drain-to-source voltage rating (Vdss) is 800 V. The maximum on-resistance is 750 mΩ at 5.25 A drain current with 10 V gate drive."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STF12NK80Z","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STF12NK80Z 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}}