{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL431BID","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL431BID","canonicalUrl":"https://icboms.com/texas-instruments/TL431BID","factsUrl":"https://icboms.com/api/mcp/products/TL431BID","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TL431BID, adjustable shunt voltage reference, ±0.5% tolerance, 100 mA output, 700 µA cathode current, 2.495V to 36V output, -40°C to 85°C, 8-SOIC package.","salesMarkdown":"## Precision shunt reference — what the ±0.5% tolerance buys you Its ±0.5% tolerance means the initial reference voltage at the adjust pin is held to within 12.5 mV of the nominal 2.495 V — tight enough for precision power-supply feedback loops, overvoltage protection thresholds, and A/D converter references where a 1% part would drift outside the error budget. It delivers up to 100 mA with a minimum cathode current of 700 µA, so it can drive optocoupler LEDs or bias a small load directly. ## Package and footprint — 8-SOIC with tube delivery The mounting type is surface mount. No special thermal pad or via stitching is required for this shunt reference; its dissipation is modest at the rated output current. ## Lifecycle reality — obsolete, but still sourceable It remains ROHS3 compliant. For BOM lines that already use this part, procurement must go through the independent surplus and broker channel. Because the TL431BID is obsolete, it is not sitting on franchised distributor shelves. Independent stock varies by date code and region. When you submit an RFQ, the quote will reflect the prevailing spot price for available inventory — expect a premium over the original catalog price, especially if the part is in a tight allocation window for legacy industrial equipment repairs. For production runs, verify date code consistency and request traceability documentation from the broker. If you are filling a last-time-buy or repair order, this part is still findable, but plan for a longer lead time and higher per-unit cost than an active alternative.","metaTitle":"TL431BID Shunt Voltage Reference, ±0.5% Tolerance, 8-SOIC","metaDescription":"Texas Instruments TL431BID adjustable shunt voltage reference, ±0.5% tolerance, 100 mA output, -40°C to 85°C, 8-SOIC.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Obsolete","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tube","Tolerance":"±0.5%","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Active","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~85°C(TA)","Voltage - Output (Max)":"36 V","Supplier Device Package":"8-SOIC","Temperature Coefficient":"-","Voltage - Output (Min/Fixed)":"2.495V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0400","priceTiers":[{"qty":1,"price":"$1.09000","currency":"USD"},{"qty":10,"price":"$0.97900","currency":"USD"},{"qty":25,"price":"$0.92880","currency":"USD"},{"qty":100,"price":"$0.76290","currency":"USD"},{"qty":250,"price":"$0.71320","currency":"USD"},{"qty":500,"price":"$0.63026","currency":"USD"},{"qty":1000,"price":"$0.49757","currency":"USD"},{"qty":2500,"price":"$0.46941","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/2e8567ad04842692d5fb8309c69e90b6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL431BID/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for TL431BID?","answer":"For a functional replacement, consider a pin-compatible shunt reference from the TL431 family with an active lifecycle status, or the LM4132AMF-4.1/NOPB series reference if a fixed 4.096 V output and ±0.05% tolerance fit your design — though note it is a series topology, not a shunt, and requires a different circuit configuration."},{"question":"What is the difference between TL431BID and TL431AID?","answer":"The difference is in the initial tolerance grade. The TL431BID carries a ±0.5% tolerance, while the TL431AID is typically a ±1% grade (not shown in this evidence). The B-grade is tighter and preferred for precision feedback loops where the 1% part would introduce unacceptable error."},{"question":"What is TL431BID's listed tolerance?","answer":"The TL431BID has a ±0.5% tolerance on the reference voltage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL431BID","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL431BID 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}}