{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STD3N40K3","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STD3N40K3","canonicalUrl":"https://icboms.com/stmicroelectronics/STD3N40K3","factsUrl":"https://icboms.com/api/mcp/products/STD3N40K3","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SuperMESH3™ STD3N40K3, N-Channel MOSFET, 400 V Vdss, 2 A Id, 3.4 Ohm Rds(on) at 10 V, DPAK (TO-252) surface mount, -55 to 150 °C.","salesMarkdown":"## 400 V, 2 A N-channel — SuperMESH3 in a DPAK At 2 A the conduction loss hits about 13.6 W — well within the 30 W package dissipation limit at the case, but the junction-to-ambient thermal path in a DPAK will need a decent copper area or a heatsink to keep the junction below 150 °C. The STD3N40K3 carries an Obsolete lifecycle status. STMicroelectronics has ended production, and no last-time-buy window remains open through the factory channel. ## DPAK footprint and temperature range The DPAK (TO-252) package has a tab that is electrically the drain.","metaTitle":"STD3N40K3 N-Channel MOSFET, 400 V, 2 A, SuperMESH3","metaDescription":"STD3N40K3 N-channel 400 V, 2 A MOSFET in DPAK. 3.4 Ohm Rds(on) at 10 V.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"SuperMESH3™","Package":"Tape & Reel (TR) Cut Tape (CT)","FET Type":"N-Channel","Vgs (Max)":"±30V","Technology":"MOSFET (Metal Oxide)","FET Feature":"-","Mounting Type":"Surface Mount","Package / Case":"TO-252-3, DPak (2 Leads + Tab), SC-63","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"4.5V @ 50µA","Base Product Number":"STD3","Operating Temperature":"-55°C ~ 150°C (TJ)","Rds On (Max) @ Id, Vgs":"3.4Ohm @ 900mA, 10V","Power Dissipation (Max)":"30W (Tc)","Supplier Device Package":"DPAK","Gate Charge (Qg) (Max) @ Vgs":"11 nC @ 10 V","Drain to Source Voltage (Vdss)":"400 V","Input Capacitance (Ciss) (Max) @ Vds":"165 pF @ 50 V","Drive Voltage (Max Rds On, Min Rds On)":"10V","Current - Continuous Drain (Id) @ 25°C":"2A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.5200","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STD3N40K3/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for STD3N40K3?","answer":"For a pin-compatible drop-in, look at other SuperMESH3 N-channel MOSFETs in DPAK with similar 400 V / 2 A ratings — the STD3N40K4 is a close sibling in the same series, but confirm the Rds(on) and gate charge differences against your design margin before substituting."},{"question":"Is STD3N40K3 obsolete?","answer":"Yes. The lifecycle status is Obsolete — STMicroelectronics has discontinued production. No last-time-buy window is active through the factory channel."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STD3N40K3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STD3N40K3 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}}