{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STF3N80K5","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STF3N80K5","canonicalUrl":"https://icboms.com/stmicroelectronics/STF3N80K5","factsUrl":"https://icboms.com/api/mcp/products/STF3N80K5","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SuperMESH5™ STF3N80K5, N-Channel MOSFET, 800 V Vdss, 2.5 A Id, 3.5 Ohm Rds(on) at 10 V, 9.5 nC Qg, TO-220 Full Pack, -55 to 150 °C.","salesMarkdown":"## 800 V N-channel in a fully isolated through-hole package That saves a BOM line and assembly step in through-hole power supplies. At 2.5 A the conduction loss is I²R = 22 W — right at the 20 W power dissipation limit, so the thermal design needs a heatsink with good airflow or forced convection. Gate charge is 9.5 nC at 10 V; that's low enough that a simple PWM controller with a totem-pole driver can switch it cleanly at 65–100 kHz without excessive drive losses. Input capacitance is 130 pF at 100 V drain-source — a small number that keeps the switching node capacitance low in a flyback primary, reducing turn-on losses and ringing on the drain node. ## Active production, ROHS3, and the full-pack advantage The TO-220 Full Pack package is the same 3-pin through-hole footprint as a standard TO-220, but the exposed metal tab is at drain potential and fully isolated from the case — you can mount it with a single screw and a dab of thermal grease, no mica washer. ## Where it fits — flyback primary, auxiliary supply, PFC boost The 800 V rating and 2.5 A current make this a natural fit for the primary-side switch in off-line flyback converters up to about 30–40 W, auxiliary power supplies for industrial controls, and single-stage PFC boost stages where the voltage stress stays under 600 V. The full-pack isolation simplifies heatsinking in metal-enclosed equipment where the heatsink is grounded to the chassis.","metaTitle":"STF3N80K5 N-Channel MOSFET, 800 V, 2.5 A, TO-220FP","metaDescription":"STF3N80K5 N-channel 800 V 2.5 A MOSFET in TO-220 Full Pack. 3.5 Ohm Rds(on), 9.5 nC gate charge. Active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":"SuperMESH5™","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"SuperMESH5™","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":"Active","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"5V @ 100µA","Base Product Number":"STF3N80","Operating Temperature":"-55°C ~ 150°C (TJ)","Rds On (Max) @ Id, Vgs":"3.5Ohm @ 1A, 10V","Power Dissipation (Max)":"20W (Tc)","Supplier Device Package":"TO-220FP","Gate Charge (Qg) (Max) @ Vgs":"9.5 nC @ 10 V","Drain to Source Voltage (Vdss)":"800 V","Input Capacitance (Ciss) (Max) @ Vds":"130 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":"$1.7900","priceTiers":[{"qty":1,"price":"$1.79000","currency":"USD"},{"qty":10,"price":"$1.49100","currency":"USD"},{"qty":100,"price":"$1.18630","currency":"USD"},{"qty":500,"price":"$1.00382","currency":"USD"},{"qty":1000,"price":"$0.85172","currency":"USD"},{"qty":2000,"price":"$0.80914","currency":"USD"},{"qty":5000,"price":"$0.77872","currency":"USD"},{"qty":10000,"price":"$0.75294","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/4b8d013eeb7153c2248e954cd7f6ef11.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STF3N80K5/alternatives.json"},"ai":{"faq":[{"question":"Is STF3N80K5 equivalent to STF3N80K4?","answer":"The STF3N80K5 is a later-generation SuperMESH5™ device. The K4 variant is from the same voltage/current class but uses an older die technology. Pin-compatible in the same TO-220FP footprint, but the K5 offers lower gate charge and improved switching performance. Check the specific Rds(on) and Qg values against your design targets before substituting."},{"question":"Can I use STF3N80K5 in a flyback converter?","answer":"Yes, the 800 V drain-source rating and 2.5 A continuous current are well suited for the primary switch in off-line flyback converters up to about 30–40 W. The 9.5 nC gate charge keeps drive losses low at typical switching frequencies, and the full-pack package simplifies heatsinking."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STF3N80K5","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STF3N80K5 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}