{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STB21N65M5","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STB21N65M5","canonicalUrl":"https://icboms.com/stmicroelectronics/STB21N65M5","factsUrl":"https://icboms.com/api/mcp/products/STB21N65M5","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics MDmesh V series N-channel MOSFET, STB21N65M5, 650 Vdss, 17 A continuous drain, 190 mOhm Rds(on) at 10 V, D2PAK (TO-263) surface-mount package.","salesMarkdown":"## 650 V, 190 mOhm — what that buys in an offline supply That voltage class targets the primary side of offline flyback, PFC boost, and LLC resonant converters where the DC bus sits around 400 V and the drain rings past 600 V during turn-off. ## Gate charge and switching loss budget Total gate charge at 10 V is 50 nC. For a 100 kHz hard-switched converter, the gate-drive power is Qg × Vgs × fsw = 50 nC × 10 V × 100 kHz = 50 mW — well within a standard driver's dissipation. The input capacitance Ciss is 1950 pF at 100 V drain bias, which together with the gate resistance sets the turn-on/turn-off delay. Keep the gate-loop inductance tight; a 10 Ω series gate resistor is a typical starting point to damp ringing without slowing the edge too much. ## Thermal and mounting — D2PAK real estate Maximum power dissipation is 125 W at case temperature. A two-layer board with a 2 oz copper pad under the tab and vias to an internal plane keeps the junction below 125°C at 30–40 W dissipation. The 150°C maximum junction temperature gives headroom for peak-load transients. Surface-mount assembly: standard reflow profile for lead-free solder. The tab solder joint is visually inspectable from the board edge. No special moisture sensitivity level is stated, but a bake at 125°C for 24 hours before reflow is safe practice if the tape has been opened and exposed to humid shop air.","metaTitle":"STB21N65M5 MDmesh V N-Ch MOSFET, 650V 17A D2PAK","metaDescription":"STB21N65M5 N-channel 650V 17A MOSFET, MDmesh V series, 190 mOhm Rds(on) at 10V. Active production, ROHS3 compliant. D2PAK surface-mount.","metaKeywords":null},"attributes":{"series":"MDmesh™ V","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":[],"specifications":{"Series":"MDmesh™ V","Package":"Tape & Reel (TR); Cut Tape (CT)","FET Type":"N-Channel","Vgs (Max)":"±25V","Technology":"MOSFET (Metal Oxide)","Mounting Type":"Surface Mount","Package / Case":"TO-263-3, D²Pak (2 Leads + Tab), TO-263AB","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"5V @ 250µA","Operating Temperature":"150°C (TJ)","Rds On (Max) @ Id, Vgs":"190mOhm @ 8.5A, 10V","Power Dissipation (Max)":"125W (Tc)","Supplier Device Package":"D2PAK","Gate Charge (Qg) (Max) @ Vgs":"50 nC @ 10 V","Drain to Source Voltage (Vdss)":"650 V","Input Capacitance (Ciss) (Max) @ Vds":"1950 pF @ 100 V","Drive Voltage (Max Rds On, Min Rds On)":"10V","Current - Continuous Drain (Id) @ 25°C":"17A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.06","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$5.06000","currency":"USD"},{"qty":10,"price":"$4.24800","currency":"USD"},{"qty":100,"price":"$3.43620","currency":"USD"},{"qty":500,"price":"$3.05440","currency":"USD"},{"qty":1000,"price":"$2.61533","currency":"USD"},{"qty":2000,"price":"$2.46261","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/adb8affee800b1de8970ff75f289394a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the Rds(on) of STB21N65M5?","answer":"Maximum on-resistance is 190 mOhm at 8.5 A drain current with 10 V gate drive."},{"question":"Is STB21N65M5 RoHS compliant?","answer":"Yes, it is listed as ROHS3 compliant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STB21N65M5","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STB21N65M5 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}}