{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STF4N52K3","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STF4N52K3","canonicalUrl":"https://icboms.com/stmicroelectronics/STF4N52K3","factsUrl":"https://icboms.com/api/mcp/products/STF4N52K3","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SuperMESH3™ STF4N52K3, N-channel MOSFET, 525 V drain-source, 2.5 A continuous drain, 2.6 Ω Rds(on) at 10 V, TO-220 Full Pack through-hole package.","salesMarkdown":"The 525 V Vdss gives a healthy margin for universal-input flyback designs (up to 400 V DC bus) and 3-phase rectified rails. The 2.5 A continuous rating is a steady-state ceiling; the 11 nC typical gate charge at 10 V keeps switching losses low enough for moderate-frequency converters (50–150 kHz). The 2.6 Ω Rds(on) is specified at 10 V drive, so a 12 V or 15 V gate supply is preferred — a 5 V logic-level drive will not fully enhance the channel, and you will see significantly higher on-resistance. That means no further production runs from the factory; the only supply channel is the independent distribution and surplus market. For new designs or long-term production, you will want to evaluate a pin-compatible replacement within the SuperMESH3™ family or a similar 525 V N-channel TO-220FP MOSFET from ST or another vendor.","metaTitle":"STF4N52K3 N-Channel MOSFET, 525 V, 2.5 A, TO-220FP","metaDescription":"STF4N52K3 SuperMESH3™ N-channel MOSFET, 525 Vds, 2.5 A, 2.6 Ω Rds(on). 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":"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":"STF4N","Operating Temperature":"150°C(TJ)","Rds On (Max) @ Id, Vgs":"2.6Ohm @ 1.25A, 10V","Power Dissipation (Max)":"20W (Tc)","Supplier Device Package":"TO-220FP","Gate Charge (Qg) (Max) @ Vgs":"11 nC @ 10 V","Drain to Source Voltage (Vdss)":"525 V","Input Capacitance (Ciss) (Max) @ Vds":"334 pF @ 100 V","Drive Voltage (Max Rds On, Min Rds On)":"10V","Current - Continuous Drain (Id) @ 25°C":"2.5A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.1200","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/c380a8ff7c9080a3874275117d335131.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STF4N52K3/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for STF4N52K3?","answer":"STMicroelectronics has not published an official direct replacement for the STF4N52K3. For new designs, look for a 525 V or higher-rated N-channel MOSFET in a TO-220 Full Pack package with similar Rds(on) and gate charge — for example, a later SuperMESH3™ or SuperMESH5™ device from ST. Confirm pin-compatibility and thermal performance before substituting."},{"question":"What are the specifications of STF4N52K3?","answer":"Gate charge is 11 nC at 10 V, input capacitance is 334 pF at 100 V drain bias, and it is packaged in a TO-220 Full Pack (TO-220FP) through-hole package."},{"question":"Is STF4N52K3 compatible with TO-220 Full Pack?","answer":"Yes, the STF4N52K3 is supplied in a TO-220 Full Pack (TO-220FP) package, which is a fully isolated through-hole package. It is footprint-compatible with standard TO-220 Full Pack layouts but is not pin-compatible with a standard TO-220 (non-isolated) — the full-pack version has a different lead form and no exposed metal tab."},{"question":"Where can I buy STF4N52K3?","answer":"We source the STF4N52K3 through independent distribution channels. Submit an RFQ through this page for a current price and availability quote — we confirm both at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STF4N52K3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STF4N52K3 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}}