{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STF40NF03L","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STF40NF03L","canonicalUrl":"https://icboms.com/stmicroelectronics/STF40NF03L","factsUrl":"https://icboms.com/api/mcp/products/STF40NF03L","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STripFET™ series, N-Channel MOSFET, 30 V drain-source, 22 mΩ Rds(on) at 20 A, 10 V gate drive, 23 A continuous drain, TO-220 Full Pack through-hole package, -55°C to 175°C junction temperature.","salesMarkdown":"The STF40NF03L: 30 V drain-source rating and 22 mΩ maximum on-resistance at 20 A suit load switches, DC-DC converter primary-side switching, and battery-management circuits. The TO-220 Full Pack package provides full isolation from the heatsink. ## Why the 22 mΩ Rds(on) and 23 A rating matter for your BOM At 20 A drain current with 10 V gate drive, the 22 mΩ maximum Rds(on) keeps conduction loss under 9 W at full load — manageable in the TO-220FP with its 25 W power dissipation ceiling. The gate charge is 15 nC at 4.5 V, so the driver sees a light capacitive load — good news for fast switching without a high-current gate driver. ## Obsolete — sourcing reality and what to do The STF40NF03L is listed as obsolete. It is no longer in production from STMicroelectronics, so new-stock procurement goes through the surplus and broker channel.","metaTitle":"STF40NF03L STripFET N-Ch MOSFET, 30 V, 22 mΩ, TO-220FP","metaDescription":"STF40NF03L N-channel MOSFET from STripFET series, 30 V Vdss, 22 mOhm Rds(on) at 20 A, TO-220 Full Pack. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"STripFET™","Package":"Tube","FET Type":"N-Channel","Vgs (Max)":"±16V","Technology":"MOSFET (Metal Oxide)","FET Feature":"-","Mounting Type":"Through Hole","Package / Case":"TO-220-3 Full Pack","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"2.5V @ 250µA","Base Product Number":"STF40N","Operating Temperature":"-55°C ~ 175°C (TJ)","Rds On (Max) @ Id, Vgs":"22mOhm @ 20A, 10V","Power Dissipation (Max)":"25W (Tc)","Supplier Device Package":"TO-220FP","Gate Charge (Qg) (Max) @ Vgs":"15 nC @ 4.5 V","Drain to Source Voltage (Vdss)":"30 V","Input Capacitance (Ciss) (Max) @ Vds":"770 pF @ 25 V","Drive Voltage (Max Rds On, Min Rds On)":"4.5V, 10V","Current - Continuous Drain (Id) @ 25°C":"23A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/a874dfbe4c605b283c2b3012250879b6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STF40NF03L/alternatives.json"},"ai":{"faq":[{"question":"What is the Vgs threshold for STF40NF03L?","answer":"The maximum gate threshold voltage is 2.5 V at a drain current of 250 µA. The drive voltage range for achieving the specified Rds(on) is 4.5 V (minimum) to 10 V (maximum)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STF40NF03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STF40NF03L when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}