{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL431BCDBZT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL431BCDBZT","canonicalUrl":"https://icboms.com/texas-instruments/TL431BCDBZT","factsUrl":"https://icboms.com/api/mcp/products/TL431BCDBZT","rawCanonicalId":null},"summary":{"shortDescription":"onsemi TL431BCDBZT, adjustable shunt voltage reference, ±0.5% tolerance, 100 mA output, 2.495 V reference, SOT-23-3 surface mount, 0°C to 70°C.","salesMarkdown":"## Precision shunt reference in a small SOT-23-3 The onsemi TL431BCDBZT is an adjustable shunt voltage reference — the classic three-terminal programmable regulator that shows up in feedback loops, power-supply error amps, and precision reference circuits. The B-grade brings tighter initial accuracy: ±0.5% tolerance on the 2.495 V internal reference, which matters when you're setting the output voltage of a flyback converter or the threshold of an overvoltage crowbar. ## Output current and cathode current — the drive budget Rated for 100 mA output current, the TL431BCDBZT can sink enough current to pull down an optocoupler LED in a secondary-side feedback loop or drive a small load directly. Minimum cathode current is 600 µA — below that the reference loses regulation, so the bias resistor must be sized to keep at least 600 µA flowing through the device at all times. Housed in a SOT-23-3 (TO-236-3 / SC-59) surface-mount package, the TL431BCDBZT fits tight layouts where board space is at a premium. ## Active production, no LTB worry That means no last-time-buy scramble for existing BOMs, and it stays available for new designs that don't need the extended industrial temperature range.","metaTitle":"TL431BCDBZT Shunt Regulator, ±0.5% Tolerance, SOT-23-3","metaDescription":"TL431BCDBZT adjustable shunt regulator from onsemi, ±0.5% tolerance, 100 mA output, 0°C to 70°C, SOT-23-3.","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); Cut Tape (CT)","Tolerance":"±0.5%","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Product Status":"Active","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-23-3","Temperature Coefficient":"-","Voltage - Output (Min/Fixed)":"2.495V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0100","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/2e8567ad04842692d5fb8309c69e90b6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL431BCDBZT/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL431BCDBZT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL431BCDBZT 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}}