{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STF40NF20","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STF40NF20","canonicalUrl":"https://icboms.com/stmicroelectronics/STF40NF20","factsUrl":"https://icboms.com/api/mcp/products/STF40NF20","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STripFET™ STF40NF20, N-Channel MOSFET, 200 V Vds, 40 A Id, 45 mOhm Rds(on) @ 20 A, 10 V, TO-220-3 Full Pack (TO-220FP), Through Hole, ±20 V Vgs(max).","salesMarkdown":"## 200 V, 40 A N-channel switch in an isolated-tab TO-220 The STF40NF20 is a 200 V, 40 A N-channel power MOSFET from ST's STripFET trench-gate family, housed in the TO-220 Full Pack (TO-220FP) through-hole package. The full-pack moulding isolates the metal tab from the drain, so the device can be bolted directly to a heatsink or chassis without an insulating washer — a real time-saver on the assembly line and a BOM simplification for offline power supplies, motor drives, and DC-DC converters where the heatsink is grounded. That number sets the conduction loss at full load: at 20 A the I²R dissipation hits about 18 W, which is manageable inside the 40 W package limit (Tc) if the heatsink is sized right. No last-time-buy notice, no end-of-life risk.","metaTitle":"STF40NF20 STripFET N-Channel MOSFET, 200 V, 40 A, TO-220FP","metaDescription":"STF40NF20 N-channel 200 V, 40 A MOSFET in TO-220 Full Pack. 45 mOhm Rds(on) at 10 V gate drive.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"STripFET™","Package":"Tube","FET Type":"N-Channel","Vgs (Max)":"±20V","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":"4V @ 250µA","Base Product Number":"STF40","Operating Temperature":"-55°C~150°C(TJ)","Rds On (Max) @ Id, Vgs":"45mOhm @ 20A, 10V","Power Dissipation (Max)":"40W (Tc)","Supplier Device Package":"TO-220FP","Gate Charge (Qg) (Max) @ Vgs":"75 nC @ 10 V","Drain to Source Voltage (Vdss)":"200 V","Input Capacitance (Ciss) (Max) @ Vds":"2500 pF @ 25 V","Drive Voltage (Max Rds On, Min Rds On)":"10V","Current - Continuous Drain (Id) @ 25°C":"40A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.8000","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/e8f9f0e5f5b3953682991a1fc1e9abe8.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STF40NF20/alternatives.json"},"ai":{"faq":[{"question":"What is the Rds(on) of STF40NF20?","answer":"The maximum Rds(on) is 45 mOhm at a drain current of 20 A with a 10 V gate-to-source drive. This is the figure to use for conduction-loss calculations in the power stage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STF40NF20","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STF40NF20 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}}