{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STP1N105K3","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STP1N105K3","canonicalUrl":"https://icboms.com/stmicroelectronics/STP1N105K3","factsUrl":"https://icboms.com/api/mcp/products/STP1N105K3","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STP1N105K3, SuperMESH3™ N-channel MOSFET, 1050 V Vdss, 1.4 A continuous drain, 11 Ohm Rds(on) at 600 mA, 13 nC gate charge, TO-220-3 through-hole package, -55°C to 150°C junction temperature.","salesMarkdown":"## 1050 V N-channel MOSFET — primary-side switching for offline supplies Its 1050 V drain-source breakdown voltage targets offline flyback converters, PFC boost stages, and auxiliary power supplies where 800 V rated parts leave insufficient avalanche margin. The 1.4 A continuous drain current and 60 W power dissipation suit low-to-moderate power stages, typically in chargers, adapters, and industrial bias supplies. ## 11 Ohm Rds(on) — conduction loss at low current For a 1.4 A rated device this is a moderate figure; conduction loss at full current reaches about 22 W, which combined with switching loss pushes the junction temperature toward the 150°C maximum. The 13 nC gate charge keeps drive losses low, so the part works well with a simple gate-drive transformer or a low-current driver IC at switching frequencies up to 100 kHz. STMicroelectronics lists the STP1N105K3 as Obsolete. Engineers evaluating a replacement should look for a 1050 V N-channel MOSFET in TO-220-3 with similar gate charge and Rds(on) — several manufacturers offer pin-compatible alternatives in the same voltage class. ## TO-220-3 — through-hole for legacy board retrofit The 150°C maximum junction temperature and 60 W power dissipation assume adequate heatsinking — a clip-on or screw-mounted heatsink is expected for continuous operation above 0.5 A. The package suits retrofit into existing boards where a surface-mount MOSFET would require layout changes.","metaTitle":"STP1N105K3 N-Channel MOSFET, 1050 V, 1.4 A, TO-220-3","metaDescription":"STP1N105K3 N-channel MOSFET from STMicroelectronics SuperMESH3™ series. 1050 V Vdss, 1.4 A continuous drain, 11 Ohm Rds(on), TO-220-3.","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","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"4.5V @ 50µA","Base Product Number":"STP1N","Operating Temperature":"-55°C~150°C(TJ)","Rds On (Max) @ Id, Vgs":"11Ohm @ 600mA, 10V","Power Dissipation (Max)":"60W (Tc)","Supplier Device Package":"TO-220","Gate Charge (Qg) (Max) @ Vgs":"13 nC @ 10 V","Drain to Source Voltage (Vdss)":"1050 V","Input Capacitance (Ciss) (Max) @ Vds":"180 pF @ 100 V","Drive Voltage (Max Rds On, Min Rds On)":"10V","Current - Continuous Drain (Id) @ 25°C":"1.4A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.5800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/c52445862815c250a6de44658fd1e435.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STP1N105K3/alternatives.json"},"ai":{"faq":[{"question":"Is STP1N105K3 obsolete?","answer":"Yes, STMicroelectronics has marked the STP1N105K3 as Obsolete. No direct replacement order code from ST is listed."},{"question":"What is the Rds(on) of STP1N105K3?","answer":"The maximum on-resistance is 11 Ohms at 600 mA drain current with 10 V gate drive. At lower gate voltages the Rds(on) increases significantly — the 4.5 V threshold means the part is not fully enhanced at logic-level drive."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STP1N105K3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STP1N105K3 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}}