{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STP12NM50FD","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STP12NM50FD","canonicalUrl":"https://icboms.com/stmicroelectronics/STP12NM50FD","factsUrl":"https://icboms.com/api/mcp/products/STP12NM50FD","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics FDmesh™ N-Channel MOSFET, STP12NM50FD, 500 V drain-source, 12 A continuous drain at 25°C, 400 mΩ Rds(on) at 6 A / 10 V, 12 nC gate charge, TO-220 through-hole package, -65°C to 150°C junction temperature.","salesMarkdown":"These three numbers define its primary fit: a high-voltage switching device for power supplies, inverters, and motor drives where the bus voltage sits below 400 V DC and the load current stays under 8 A with derating. That means the gate driver does not need to push much current to switch the FET, which keeps the drive-stage losses small and allows faster switching transitions. For a design targeting efficiency in a flyback converter or a two-switch forward topology, this gate charge figure is the one that determines whether your existing driver can handle it without a boost stage. Input capacitance is 1000 pF at 25 V drain-source, which is moderate. Combined with the low gate charge, the switching figure of merit (Rds(on) × Qg) comes out around 4.8 Ω·nC — competitive for this voltage class. ## TO-220 through-hole — mounting and thermal reality The STP12NM50FD comes in the standard TO-220 through-hole package. Storage temperature matches the same range. The wide negative limit matters for cold-start in outdoor equipment; the 150°C junction maximum is typical for this voltage class and sets the derating curve for high ambient temperature operation. New designs should not target this part. For existing BOM lines, the only supply route is the independent distribution market — surplus stock, new-old-stock, or broker-sourced units. The closest functional alternative would be a current-production 500 V / 12 A N-channel MOSFET in a TO-220 package from ST's MDmesh™ or PowerMESH™ series — but pin compatibility and gate-drive requirements must be verified against the specific application. The FDmesh™ series is a specific technology variant; a direct drop-in replacement is not guaranteed without reviewing the full datasheet.","metaTitle":"STP12NM50FD N-Channel MOSFET, 500V 12A TO-220","metaDescription":"STP12NM50FD N-Channel MOSFET from STMicroelectronics FDmesh™ series. 500 V drain-source, 12 A continuous, 400 mΩ Rds(on). TO-220 through-hole.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"FDmesh™","Package":"Tube","FET Type":"N-Channel","Vgs (Max)":"±30V","Technology":"MOSFET (Metal Oxide)","FET Feature":"-","Mounting Type":"Through Hole","Package / Case":"TO-220-3","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"5V @ 250µA","Base Product Number":"STP12","Operating Temperature":"-65°C~150°C(TJ)","Rds On (Max) @ Id, Vgs":"400mOhm @ 6A, 10V","Power Dissipation (Max)":"160W (Tc)","Supplier Device Package":"TO-220","Gate Charge (Qg) (Max) @ Vgs":"12 nC @ 10 V","Drain to Source Voltage (Vdss)":"500 V","Input Capacitance (Ciss) (Max) @ Vds":"1000 pF @ 25 V","Drive Voltage (Max Rds On, Min Rds On)":"10V","Current - Continuous Drain (Id) @ 25°C":"12A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.5600","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1fa5447771989c979f1e220ebb3b1ca8.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the replacement for STP12NM50FD from STMicroelectronics?","answer":"For a current-production alternative, look at ST's MDmesh™ or PowerMESH™ series of 500 V N-channel MOSFETs in TO-220, but verify pin compatibility, gate charge, and on-resistance against your design's requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STP12NM50FD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STP12NM50FD 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}}