{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL431QDBZTG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL431QDBZTG4","canonicalUrl":"https://icboms.com/texas-instruments/TL431QDBZTG4","factsUrl":"https://icboms.com/api/mcp/products/TL431QDBZTG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TL431QDBZTG4, adjustable shunt voltage reference, 2.495 V min output, 36 V max, ±2.2% tolerance, 100 mA cathode current, SOT-23-3 package, -40 to 125 °C, Tape & Reel.","salesMarkdown":"## Adjustable shunt reference in a three-pin SOT-23-3 The SOT-23-3 package fits tight board layouts where a TO-92 or SOIC-8 would consume too much area. ## Output ceiling and cathode current — sizing the pass element The maximum output voltage is 36 V, so this part works in 24 V or 12 V rails but not in a 48 V system. The cathode can sink up to 100 mA continuous, which sets the drive limit for an external transistor or optocoupler LED. ## ±2.2 % tolerance — where it fits the BOM The ±2.2 % tolerance is wider than the 0.5 % or 1 % TL431 grades. It is a cost-optimised bin for designs where the reference accuracy does not dominate the system error budget — for example, a non-isolated bias supply, a simple overvoltage crowbar, or a secondary-side feedback loop in a consumer power supply. If the design needs tighter regulation, step up to the TL431A (1 %) or TL431B (0.5 %) variants. It suits outdoor telecom enclosures, factory-floor sensor interfaces, and under-hood automotive auxiliary circuits that do not require AEC-Q100 qualification. The SOT-23-3 body has a low thermal mass, so keep the cathode current below 100 mA at the high end of the temperature range to stay inside the power-dissipation limit.","metaTitle":"TL431QDBZTG4 Shunt Regulator, Adjustable 2.495 V Ref","metaDescription":"Texas Instruments TL431QDBZTG4 adjustable shunt regulator. ±2.2% tolerance, 100 mA output, -40 to 125 °C. SOT-23-3 package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR)","Tolerance":"±2.2%","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Reference Type":"Shunt","Voltage - Input":"-","lifecycle_stage":"eol_hot","Current - Output":"100 mA","Current - Supply":"-","Current - Cathode":"1 mA","Base Product Number":"TL431","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"-","Operating Temperature":"-40°C~125°C(TA)","Voltage - Output (Max)":"36 V","Supplier Device Package":"SOT-23-3","Temperature Coefficient":"-","Voltage - Output (Min/Fixed)":"2.495V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/2e8567ad04842692d5fb8309c69e90b6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL431QDBZTG4/alternatives.json"},"ai":{"faq":[{"question":"Is the TL431QDBZTG4 obsolete?","answer":"No."},{"question":"What is the closest pin-compatible alternative to the TL431QDBZTG4?","answer":"Any standard TL431 in a SOT-23-3 package is pin-compatible. The difference is the reference tolerance: the TL431QDBZTG4 is the ±2.2 % grade. For tighter regulation, use the TL431A (1 %) or TL431B (0.5 %) in the same SOT-23-3 footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL431QDBZTG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL431QDBZTG4 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}