{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL431BQDBZTG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL431BQDBZTG4","canonicalUrl":"https://icboms.com/texas-instruments/TL431BQDBZTG4","factsUrl":"https://icboms.com/api/mcp/products/TL431BQDBZTG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TL431BQDBZTG4 adjustable shunt voltage reference, ±0.5% tolerance, 100 mA output, SOT-23-3 package, -40°C to 125°C operating temperature.","salesMarkdown":"## ±0.5% tolerance — what it buys the feedback loop The ±0.5% tolerance on the internal reference voltage (2.495 V nominal) means the output voltage set by the external resistor divider stays tight across temperature and lot — no trimming needed in production for most power-supply and supervisory circuits. ## 100 mA cathode current — load-driving headroom The 100 mA output current rating defines how much load the shunt regulator can sink while maintaining regulation. For a typical 2.5 V reference driving a feedback divider on a switching regulator, the cathode current is usually under 10 mA — so the 100 mA ceiling provides generous headroom for transient loads or driving multiple inputs. ## SOT-23-3 package — rework and board-fit note The SOT-23-3 package (also listed as TO-236-3 / SC-59) is a three-lead surface-mount footprint. It reflows cleanly with a standard hot-air profile — the small thermal mass means it reaches reflow temperature quickly, and the exposed pad on the cathode pin (pin 2) carries the heat away. Orientation is marked by a chamfer on the top face.","metaTitle":"TL431BQDBZTG4 Shunt Regulator, ±0.5% Tolerance, SOT-23-3","metaDescription":"Texas Instruments TL431BQDBZTG4 adjustable shunt voltage reference. ±0.5% tolerance, 100 mA output, -40°C to 125°C. SOT-23-3 package. Active lifecycle.","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":"±0.5%","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":"700 µA","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":"$0.6100","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/2e8567ad04842692d5fb8309c69e90b6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL431BQDBZTG4/alternatives.json"},"ai":{"faq":[{"question":"What is the tolerance of TL431BQDBZTG4?","answer":"This is the B-grade version of the TL431 family, offering tighter accuracy than the standard ±1% or ±2% grades."},{"question":"What package does TL431BQDBZTG4 come in?","answer":"The TL431BQDBZTG4 is supplied in a SOT-23-3 surface-mount package (also listed as TO-236-3 / SC-59). The shipping format is Tape & Reel (TR)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL431BQDBZTG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL431BQDBZTG4 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}}