{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BTS54040LBFAUMA1","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BTS54040LBFAUMA1","canonicalUrl":"https://icboms.com/infineon/BTS54040LBFAUMA1","factsUrl":"https://icboms.com/api/mcp/products/BTS54040LBFAUMA1","rawCanonicalId":null},"summary":{"shortDescription":"Infineon Automotive Series, Power Switch/Driver, 1:2, High Side, N-Channel, 5.5V ~ 28V Load, 3.8V ~ 5.5V Supply, 2A Output, 39mOhm Rds(on), SPI, -40°C ~ 150°C, Surface Mount, 24-PowerTDFN PG-TSON-24-3, Tape & Reel.","salesMarkdown":"## Four high-side channels with SPI diagnostic readback The Infineon BTS54040LBFAUMA1 is a four-channel high-side power switch in the Automotive Series, built for driving resistive, inductive, and capacitive loads in 12 V and 24 V vehicle electrical systems. Each of the four N-channel outputs is rated for 2 A continuous with a typical on-resistance of 39 mOhm, keeping conduction losses low enough that the PG-TSON-24-3 package can dissipate the heat without a large copper pour. ## Load voltage range and junction temperature envelope The switch handles a load supply from 5.5 V up to 28 V, covering nominal 12 V and 24 V truck/off-highway architectures with margin for load-dump transients. Fault protection includes fixed current limiting, over-temperature shutdown, and over-voltage clamping — no external TVS needed on the output for inductive load turn-off.","metaTitle":"BTS54040LBFAUMA1 Automotive High-Side Switch, 4-Ch, 39 mOhm","metaDescription":"Infineon BTS54040LBFAUMA1 automotive high-side power switch: 4 N-channel outputs, 39 mOhm Rds(on), SPI interface, 2 A per channel, -40 to 150°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Infineon Technologies","Series":"Automotive","Package":"Tape & Reel (TR)","Features":"-","Interface":"SPI","Input Type":"-","Output Type":"N-Channel","Switch Type":"General Purpose","Rds On (Typ)":"39mOhm","Mounting Type":"Surface Mount","Package / Case":"24-PowerTDFN","Voltage - Load":"5.5V ~ 28V","lifecycle_stage":"eol_hot","Fault Protection":"Current Limiting (Fixed), Over Temperature, Over Voltage","Number of Outputs":"4","Base Product Number":"BTS54040","Output Configuration":"High Side","Ratio - Input:Output":"1:2","Operating Temperature":"-40°C ~ 150°C (TJ)","Current - Output (Max)":"2A","Supplier Device Package":"PG-TSON-24-3","Voltage - Supply (Vcc/Vdd)":"3.8V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/0ab3d6a38e24f9c6898efdea64de33c5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does BTS54040LBFAUMA1 have an SPI interface and what does it control?","answer":"The SPI bus allows a microcontroller to read back fault status (overcurrent, overtemperature, overvoltage) for each of the four output channels, enabling coordinated diagnostics and limp-home strategies without additional analog monitoring circuitry."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BTS54040LBFAUMA1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BTS54040LBFAUMA1 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}}