{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL431BCDBVRG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL431BCDBVRG4","canonicalUrl":"https://icboms.com/texas-instruments/TL431BCDBVRG4","factsUrl":"https://icboms.com/api/mcp/products/TL431BCDBVRG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TL431BCDBVRG4, adjustable shunt voltage reference, ±0.5% tolerance, 2.495 V to 36 V output, 100 mA cathode current, SOT-23-5, 0°C to 70°C.","salesMarkdown":"## TL431BCDBVRG4 — precision shunt reference, now obsolete The Texas Instruments TL431BCDBVRG4 is an adjustable shunt voltage reference in a SOT-23-5 package, delivering a 2.495 V fixed minimum output with a ±0.5% tolerance. The part is officially marked obsolete by Texas Instruments. Any stock on the market is new-old-stock or surplus, sourced through independent distribution. The 2.495 V reference is the starting point for any adjustable shunt-regulator design — the feedback divider sets the output anywhere from that floor up to 36 V. The ±0.5% tolerance (B grade) is the key spec for precision supplies, error amplifiers, or secondary-side regulation in a flyback converter where the reference accuracy sets the output-voltage tolerance. Cathode current range is 600 µA minimum to 100 mA maximum. The 600 µA floor dictates the bias resistor value in a shunt regulator — go below it and the device stops regulating. The 100 mA ceiling limits how much load the reference can sink directly; for higher currents you need a series-pass transistor. Not rated for automotive or extended industrial environments where the ambient exceeds 70°C. ## Sourcing an obsolete part — what to expect The remaining inventory is held by independent distributors and surplus houses. Pricing and availability vary with market conditions and are confirmed only at quote time against a specific BOM quantity. The closest pin-compatible alternative in the same family is the TL431BCDBVR (the non-G4 suffix variant), which shares the same SOT-23-5 footprint and electrical specs — but that part may also face lifecycle pressure. For new designs, consider the TL431BQDBZR (AEC-Q100 qualified) or the TL431AIDBZR (industrial temp, -40°C to 125°C) as functional replacements, though verify the pinout and stability compensation.","metaTitle":"TL431BCDBVRG4 Shunt Voltage Reference, ±0.5%, Obsolete","metaDescription":"Texas Instruments TL431BCDBVRG4 adjustable shunt reference, ±0.5% tolerance, SOT-23-5, 2.495 V to 36 V output.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR)","Tolerance":"±0.5%","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"SC-74A, SOT-753","Product Status":"Obsolete","Reference Type":"Shunt","Voltage - Input":"-","lifecycle_stage":"eol_hot","Current - Output":"100 mA","Current - Supply":"-","Current - Cathode":"600 µA","Base Product Number":"TL431","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"-","Operating Temperature":"0°C~70°C(TA)","Voltage - Output (Max)":"36 V","Supplier Device Package":"SOT-23-5","Temperature Coefficient":"-","Voltage - Output (Min/Fixed)":"2.495V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/99b53f28cf28b982a16c2a9ac87cd6e9.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL431BCDBVRG4/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for TL431BCDBVRG4?","answer":"No official successor is listed. The TL431BCDBVR (without the G4 suffix) is pin-compatible and electrically identical, but may also be nearing end-of-life. For new designs, consider the TL431BQDBZR (AEC-Q100, -40°C to 125°C) or the TL431AIDBZR (industrial temp) — both are functional replacements in the same SOT-23-5 footprint, though verify the compensation capacitor and bias resistor for your specific loop."},{"question":"What is the difference between TL431A, TL431B, and TL431C?","answer":"The suffix letters denote the reference voltage tolerance grade: TL431A is ±1%, TL431B is ±0.5%, and TL431C is ±2.2%. The TL431BCDBVRG4 is the B-grade (±0.5%) variant, offering tighter accuracy than the standard C-grade."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL431BCDBVRG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL431BCDBVRG4 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}}