{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STD3NM50T4","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STD3NM50T4","canonicalUrl":"https://icboms.com/stmicroelectronics/STD3NM50T4","factsUrl":"https://icboms.com/api/mcp/products/STD3NM50T4","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STD3NM50T4, MDmesh™ N-Channel MOSFET, 550 V drain-source, 3 A continuous drain, 3 Ohm Rds(on) at 10 V, TO-252-3 (DPAK) surface-mount package.","salesMarkdown":"It comes in a TO-252-3 (DPAK) surface-mount package, which suits compact power supplies, auxiliary flyback converters, and PFC stages where board space is tight. ## Obsolete — last-time-buy window is closed ST no longer manufactures this device, and the last-time-buy window has passed. Any stock available in the independent channel is new-old-stock or surplus. For a production BOM line, a pin-compatible replacement within the same MDmesh family is the practical path — the STD3N50T4 (same TO-252 footprint, 500 V, similar gate charge) is a common cross-shop candidate, but verify the 500 V vs 550 V rating and Rds(on) differences against your derating requirements before substituting. ## Gate drive and switching — 5.5 nC Qg keeps the driver small The ±30 V gate-source maximum gives headroom for transient spikes, though the recommended drive voltage for rated Rds(on) is 10 V. Independent distributors hold remaining inventory. For a BOM that cannot requalify a replacement, securing a date-code-verified lot from a reputable broker is the only path. If the design can accommodate a drop-in alternative, the STD3N50T4 or a later MDmesh M5/M6 series part in DPAK (e.g., 550 V, 3 A class) should be evaluated for fit.","metaTitle":"STD3NM50T4 N-Channel MOSFET, 550 V, 3 A, MDmesh","metaDescription":"STD3NM50T4 N-Channel MOSFET, 550 Vdss, 3 A continuous drain, 3 Ohm Rds(on) at 10 V Vgs.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"MDmesh™","Package":"Tape & Reel (TR)","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":"5V @ 250µA","Base Product Number":"STD3N","Operating Temperature":"150°C(TJ)","Rds On (Max) @ Id, Vgs":"3Ohm @ 1.5A, 10V","Power Dissipation (Max)":"46W (Tc)","Supplier Device Package":"DPAK","Gate Charge (Qg) (Max) @ Vgs":"5.5 nC @ 10 V","Drain to Source Voltage (Vdss)":"550 V","Input Capacitance (Ciss) (Max) @ Vds":"140 pF @ 25 V","Drive Voltage (Max Rds On, Min Rds On)":"10V","Current - Continuous Drain (Id) @ 25°C":"3A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/58f31dee10aa89a646dd22b09821556e.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STD3NM50T4/alternatives.json"},"ai":{"faq":[{"question":"Is STD3NM50T4 obsolete?","answer":"Yes, the STD3NM50T4 carries an Obsolete lifecycle status. STMicroelectronics no longer manufactures this part, and the last-time-buy window has closed."},{"question":"What is the direct replacement for STD3NM50T4?","answer":"There is no official successor listed for the STD3NM50T4. A common cross-shop candidate is the STD3N50T4 (same TO-252 DPAK footprint, 500 V drain-source), but you must verify the 500 V vs 550 V rating, Rds(on), and gate charge against your design margins before substituting."},{"question":"What is the Rds(on) of STD3NM50T4 at 10 V Vgs?","answer":"The maximum on-resistance is 3 Ohm at 10 V gate drive, tested at 1.5 A drain current."},{"question":"Can I replace STD3NM50T4 with STD3N50T4?","answer":"The STD3N50T4 is a similar N-channel MOSFET in the same TO-252 package, but it is rated at 500 V drain-source instead of 550 V. Verify the voltage derating, Rds(on), and gate charge in your circuit before using it as a drop-in replacement."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STD3NM50T4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STD3NM50T4 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}}