{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STP85NF55","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STP85NF55","canonicalUrl":"https://icboms.com/stmicroelectronics/STP85NF55","factsUrl":"https://icboms.com/api/mcp/products/STP85NF55","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STripFET™ II STP85NF55, N-Channel MOSFET, 55 V drain-to-source, 80 A continuous drain, 8 mOhm Rds(on) at 10 V, 150 nC gate charge, TO-220-3 through-hole package, -55°C to 175°C junction temperature.","salesMarkdown":"The 55 V drain-to-source rating sets the maximum bus voltage this FET can block; in a 48 V nominal system with transients, you need derating headroom. Gate charge of 150 nC at 10 V tells you the driver must supply that charge per switching cycle — a 1 A gate driver charges the gate in about 150 ns, but the 3700 pF input capacitance also affects switching speed and drive losses. ## Lifecycle reality — obsolete and sourcing For new designs, a pin-compatible replacement should be identified.","metaTitle":"STP85NF55 STMicroelectronics N-Channel MOSFET","metaDescription":"STP85NF55 N-Channel MOSFET, 55V drain-source, 80A continuous drain, 8mOhm Rds(on) at 10V, TO-220-3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"STripFET™ II","Package":"Tube","FET Type":"N-Channel","Vgs (Max)":"±20V","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":"4V @ 250µA","Base Product Number":"STP85","Operating Temperature":"-55°C~175°C(TJ)","Rds On (Max) @ Id, Vgs":"8mOhm @ 40A, 10V","Power Dissipation (Max)":"300W (Tc)","Supplier Device Package":"TO-220","Gate Charge (Qg) (Max) @ Vgs":"150 nC @ 10 V","Drain to Source Voltage (Vdss)":"55 V","Input Capacitance (Ciss) (Max) @ Vds":"3700 pF @ 25 V","Drive Voltage (Max Rds On, Min Rds On)":"10V","Current - Continuous Drain (Id) @ 25°C":"80A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.4400","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STP85NF55/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy STP85NF55?","answer":"The STP85NF55 is obsolete and no longer in production, but it can be sourced through independent distribution. Submit an RFQ for current availability and pricing — the part is quoted to order, not stocked on the shelf."},{"question":"What is the replacement for STP85NF55?","answer":"For a pin-compatible alternative, look for other N-channel MOSFETs in the TO-220-3 package with similar 55 V drain-source and 80 A current ratings from ST's STripFET family or competitors — but verify the gate drive and Rds(on) match your design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STP85NF55","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STP85NF55 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}}