{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BTS443PAUMA1","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BTS443PAUMA1","canonicalUrl":"https://icboms.com/infineon/BTS443PAUMA1","factsUrl":"https://icboms.com/api/mcp/products/BTS443PAUMA1","rawCanonicalId":null},"summary":{"shortDescription":"Infineon PROFET® BTS443PAUMA1, high-side N-channel power switch, 13 mOhm typical Rds(on), 21 A max output, 5 V to 36 V load supply, TO-252-5 package, -40°C to 150°C junction temperature.","salesMarkdown":"## 13 mOhm Rds(on) — the thermal budget anchor The Infineon BTS443PAUMA1 is a single-channel PROFET high-side switch with a typical on-resistance of 13 mOhm. At 21 A continuous output, the conduction loss is I²R = 5.7 W — that heat has to go somewhere. The PG-TO252-5-11 package's exposed tab is the primary thermal path; a solid copper pour on the PCB landing pad is non-negotiable if you plan to run near the 21 A ceiling. ## 21 A output — derate before you design The 21 A maximum output is the fixed current-limit threshold, not a continuous rating at high ambient. The part integrates fixed current limiting, over-temperature, and over-voltage protection — so the switch will fold back before it fries itself. But if your load draws 18 A steady-state in a 85°C enclosure, you'll hit the thermal shutdown long before the current limit. Plan your derating from the junction temperature ceiling of 150°C. It is still available for existing production runs, but Infineon has flagged it for eventual phase-out. The load supply range spans 5 V to 36 V, covering 12 V automotive, 24 V industrial, and 5 V logic-level loads. The input is non-inverting and the switch is self-powered from the load supply — no separate Vcc bias rail is required. That simplifies the BOM, but it means the gate drive voltage tracks the load supply, so Rds(on) will be higher at 5 V than at 12 V. At 5 V load, budget for the on-resistance increase versus the 13 mOhm typical at nominal conditions.","metaTitle":"BTS443PAUMA1 PROFET high-side switch, 13 mOhm, 21 A, NRND","metaDescription":"Infineon BTS443PAUMA1 PROFET high-side power switch, 13 mOhm Rds(on), 21 A max output, 5-36 V load range.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Infineon Technologies","Series":"PROFET®","Package":"Tape & Reel (TR) Cut Tape (CT)","Features":"-","Interface":"On/Off","Input Type":"Non-Inverting","Output Type":"N-Channel","Switch Type":"General Purpose","Rds On (Typ)":"13mOhm","Mounting Type":"Surface Mount","Package / Case":"TO-252-5, DPak (4 Leads + Tab), TO-252AD","Product Status":"Not For New Designs","Voltage - Load":"5V ~ 36V","lifecycle_stage":"eol_hot","Fault Protection":"Current Limiting (Fixed), Over Temperature, Over Voltage","Number of Outputs":"1","Base Product Number":"BTS443","Output Configuration":"High Side","Ratio - Input:Output":"1:1","Operating Temperature":"-40°C ~ 150°C (TJ)","Current - Output (Max)":"21A","Supplier Device Package":"PG-TO252-5-11","Voltage - Supply (Vcc/Vdd)":"Not Required"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.1900","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/61ff86c8b985b45dc7c696bd404b4920.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is BTS443PAUMA1 obsolete?","answer":"It remains available for existing production through independent distribution, but Infineon has signaled a future phase-out. For new designs, evaluate the PROFET+ or PROFET 2+ families as a pin-compatible path forward."},{"question":"What is the replacement for BTS443PAUMA1?","answer":"Infineon has not published a single direct successor order code for the BTS443PAUMA1. The base part number BTS443P is the family anchor; the PROFET+ and PROFET 2+ generations offer improved Rds(on) and diagnostic features in the same TO-252-5 footprint. Cross-reference the load voltage, current, and protection requirements against the current PROFET portfolio to identify the best match."},{"question":"Can BTS443PAUMA1 be used with 5V logic?","answer":"Yes. The input is non-inverting and the switch does not require a separate Vcc supply — it is driven directly from the load supply voltage. At a 5 V load supply, the gate drive is reduced, so the typical Rds(on) will be higher than the 13 mOhm figure quoted at nominal conditions. Confirm the voltage drop across the switch at your load current to ensure the load rail stays within tolerance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BTS443PAUMA1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BTS443PAUMA1 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}}