{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STD85N3LH5","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STD85N3LH5","canonicalUrl":"https://icboms.com/stmicroelectronics/STD85N3LH5","factsUrl":"https://icboms.com/api/mcp/products/STD85N3LH5","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STripFET™ V series, STD85N3LH5, N-Channel MOSFET, 30 V Vdss, 80 A continuous drain current, 5 mOhm Rds(on) max at 40 A, 10 V gate drive, DPAK surface-mount package.","salesMarkdown":"The STD85N3LH5 is an STMicroelectronics N-channel power MOSFET from the STripFET™ V series, built for low-voltage, high-current switching. ## Gate drive and switching — the 5 V versus 10 V decision At 5 V gate drive the Rds(on) roughly doubles from the 10 V figure, which matters if your gate driver runs from a 5 V rail — budget for higher conduction loss or step up the drive. The 14 nC gate charge at 5 V keeps the switching transition fast enough for 100–200 kHz hard-switched converters without oversized gate resistors. ## Thermal and layout — the DPAK reality The DPAK (TO-252) surface-mount package with a single exposed tab carries the 70 W dissipation limit at the case. That tab is the drain — the PCB copper area under it is the primary heatsink. A 1-inch-square copper pad on a 2-oz board gets you into the 40–50 W continuous range; beyond that, forced air or a clip-on heatsink is needed. If you are qualifying a drop-in alternative, look for a 30 V N-channel MOSFET in DPAK with Rds(on) at or below 5 mOhm at 10 V and gate charge near 14 nC; the STripFET V generation has several siblings in the same package that may match the footprint and thermal pad.","metaTitle":"STD85N3LH5 N-Channel MOSFET, 30V, 80A, 5mOhm DPAK","metaDescription":"STMicroelectronics STD85N3LH5 N-channel MOSFET, 30V Vdss, 80A Id, 5mOhm Rds(on) at 40A. STripFET V series, DPAK package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"STripFET™ V","Package":"Tape & Reel (TR); Cut Tape (CT)","FET Type":"N-Channel","Vgs (Max)":"±22V","Technology":"MOSFET (Metal Oxide)","FET Feature":"-","Mounting Type":"Surface Mount","Package / Case":"TO-252-3, DPak (2 Leads + Tab), SC-63","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"2.5V @ 250µA","Base Product Number":"STD85","Operating Temperature":"175°C(TJ)","Rds On (Max) @ Id, Vgs":"5mOhm @ 40A, 10V","Power Dissipation (Max)":"70W (Tc)","Supplier Device Package":"DPAK","Gate Charge (Qg) (Max) @ Vgs":"14 nC @ 5 V","Drain to Source Voltage (Vdss)":"30 V","Input Capacitance (Ciss) (Max) @ Vds":"1850 pF @ 25 V","Drive Voltage (Max Rds On, Min Rds On)":"5V, 10V","Current - Continuous Drain (Id) @ 25°C":"80A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.4800","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STD85N3LH5/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for STD85N3LH5?","answer":"For a pin-compatible alternative, look for a 30 V N-channel MOSFET in DPAK with Rds(on) at or below 5 mOhm at 10 V and gate charge near 14 nC within the STripFET V family or equivalent low-voltage trench FET generations."},{"question":"What is the maximum drain current of STD85N3LH5?","answer":"The continuous drain current is rated at 80 A at 25°C case temperature. This is a package-limited rating — the DPAK tab must be adequately heatsunk to sustain that current without exceeding the 175°C junction temperature."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STD85N3LH5","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STD85N3LH5 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}}