{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STF5N52K3","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STF5N52K3","canonicalUrl":"https://icboms.com/stmicroelectronics/STF5N52K3","factsUrl":"https://icboms.com/api/mcp/products/STF5N52K3","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SuperMESH3™ STF5N52K3, N-Channel MOSFET, 525 V Vdss, 4.4 A continuous drain, 1.5 Ohm Rds(on) @ 10 V, TO-220-3 Full Pack, -55°C to 150°C.","salesMarkdown":"The STF5N52K3 is listed as obsolete. Any remaining inventory on the independent market is the only source. For a production BOM that requires this part, the procurement path is surplus and broker stock. Availability and current pricing must be confirmed at quote time — the independent channel carries no scheduled replenishment. ## 525 V drain-source rating — switching power supply fit The 525 V Vdss rating suits offline flyback and forward converters where the primary-side drain sees rectified mains plus leakage inductance spikes. 4.4 A continuous drain current and 1.5 Ohm Rds(on) at 10 V gate drive require a 25 W package dissipation budget. The supplier device package is TO-220FP. Power dissipation is limited to 25 W at case temperature; the junction-to-case thermal path is the limiting factor, not the package itself.","metaTitle":"STF5N52K3 N-Channel MOSFET, 525 V, 4.4 A, SuperMESH3™","metaDescription":"STF5N52K3 N-Channel MOSFET, 525 Vdss, 4.4 A continuous drain, 1.5 Ohm Rds(on) @ 10 V. SuperMESH3™ series, TO-220FP, obsolete.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"SuperMESH3™","Package":"Tube","FET Type":"N-Channel","Vgs (Max)":"±30V","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":"4.5V @ 50µA","Base Product Number":"STF5N","Operating Temperature":"-55°C ~ 150°C (TJ)","Rds On (Max) @ Id, Vgs":"1.5Ohm @ 2.2A, 10V","Power Dissipation (Max)":"25W (Tc)","Supplier Device Package":"TO-220FP","Gate Charge (Qg) (Max) @ Vgs":"17 nC @ 10 V","Drain to Source Voltage (Vdss)":"525 V","Input Capacitance (Ciss) (Max) @ Vds":"545 pF @ 100 V","Drive Voltage (Max Rds On, Min Rds On)":"10V","Current - Continuous Drain (Id) @ 25°C":"4.4A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.7800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/6e6b9f84c734e17ddb42e3668aea6a31.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STF5N52K3/alternatives.json"},"ai":{"faq":[{"question":"Is STF5N52K3 obsolete and discontinued?","answer":"Yes, the STF5N52K3 is listed as obsolete. STMicroelectronics has discontinued production, and the part is no longer available through the factory channel. Surplus and broker inventory is the only supply route."},{"question":"Can I use STF5N52K3 for switching power supply?","answer":"Yes, the 525 V Vdss and 4.4 A rating suit primary-side switches in offline flyback and forward converters. The 17 nC gate charge keeps switching losses manageable at moderate frequencies, but the 1.5 Ohm Rds(on) is higher than modern alternatives — account for conduction loss in the thermal budget."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STF5N52K3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STF5N52K3 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}}