{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STD55NH2LLT4","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STD55NH2LLT4","canonicalUrl":"https://icboms.com/stmicroelectronics/STD55NH2LLT4","factsUrl":"https://icboms.com/api/mcp/products/STD55NH2LLT4","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STripFET™ Series STD55NH2LLT4 N-Channel MOSFET, 24 V Vdss, 40 A Id, 11 mOhm Rds(on) at 20 A, 10 V, DPAK, -55°C to 175°C.","salesMarkdown":"## Low-voltage, high-current N-channel in DPAK The STMicroelectronics STD55NH2LLT4 is an N-channel MOSFET from the STripFET™ series, designed for low-voltage, high-current switching. The gate charge is 11 nC at 4.5 V, so the drive stage doesn't need a high-current gate driver — a standard 1 A driver handles the switching edges cleanly. For a 40 A load, the 60 W package dissipation limit at the case means the thermal interface and heatsinking need attention; the DPAK's exposed tab helps pull heat into the board copper. Buyers should qualify replacement parts for new designs.","metaTitle":"STD55NH2LLT4 ST N-Channel MOSFET, 24 V, 40 A, DPAK","metaDescription":"STD55NH2LLT4 STripFET N-channel MOSFET, 24 V Vdss, 40 A Id, 11 mOhm Rds(on) at 10 V. DPAK package, -55°C to 175°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"STripFET™","Package":"Tape & Reel (TR)","FET Type":"N-Channel","Vgs (Max)":"±16V","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":"1V @ 250µA","Base Product Number":"STD55N","Operating Temperature":"-55°C ~ 175°C (TJ)","Rds On (Max) @ Id, Vgs":"11mOhm @ 20A, 10V","Power Dissipation (Max)":"60W (Tc)","Supplier Device Package":"DPAK","Gate Charge (Qg) (Max) @ Vgs":"11 nC @ 4.5 V","Drain to Source Voltage (Vdss)":"24 V","Input Capacitance (Ciss) (Max) @ Vds":"990 pF @ 25 V","Drive Voltage (Max Rds On, Min Rds On)":"4.5V, 10V","Current - Continuous Drain (Id) @ 25°C":"40A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5239","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/41586fac432fa59087175ef544ddb962.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the replacement for STD55NH2LLT4?","answer":"No official replacement is listed in the product record. For new designs, select a current-production N-channel MOSFET in DPAK with similar 24 V Vdss, 40 A Id, and 11 mOhm Rds(on) ratings."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STD55NH2LLT4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STD55NH2LLT4 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}}