{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL431QD","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL431QD","canonicalUrl":"https://icboms.com/texas-instruments/TL431QD","factsUrl":"https://icboms.com/api/mcp/products/TL431QD","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TL431QD, adjustable shunt voltage reference, 2.495V fixed minimum, ±2.2% tolerance, 100 mA output, 1 mA cathode current, -40°C to 125°C, 8-SOIC surface mount, Tube.","salesMarkdown":"## Adjustable shunt reference for precision bias and regulation Rated for 100 mA continuous output current, the TL431QD can drive optocoupler LEDs, shunt regulators, and moderate loads directly. The 1 mA minimum cathode current sets the bias floor: the device needs at least 1 mA through the cathode to maintain regulation, so the series resistor from the supply must be sized to deliver that even at the minimum input voltage. This is a common oversight when adapting a 431 design from a higher-current variant — the bias resistor calculation changes. ## Package and mounting — 8-SOIC in Tube The 8-SOIC package (0.154\" body width, 3.90 mm) is a standard JEDEC outline for small-signal ICs. The Tube shipping format is typical for engineering samples and low-volume reflow; for higher-volume tape-and-reel requirements, check the TL431QDR variant. The surface-mount footprint is compatible with standard SOIC-8 land patterns. This part is a current-design-in choice for new builds, not a phase-out risk.","metaTitle":"TL431QD Shunt Voltage Reference, Adjustable 2.495V, ±2.2%","metaDescription":"TL431QD adjustable shunt voltage reference from TI. ±2.2% tolerance, 100 mA output, -40°C to 125°C. 8-SOIC. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tube","Tolerance":"±2.2%","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":"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":"8-SOIC","Temperature Coefficient":"-","Voltage - Output (Min/Fixed)":"2.495V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9500","priceTiers":[{"qty":1,"price":"$0.95000","currency":"USD"},{"qty":10,"price":"$0.85100","currency":"USD"},{"qty":25,"price":"$0.80720","currency":"USD"},{"qty":100,"price":"$0.66310","currency":"USD"},{"qty":250,"price":"$0.61988","currency":"USD"},{"qty":500,"price":"$0.54780","currency":"USD"},{"qty":1000,"price":"$0.43248","currency":"USD"},{"qty":2500,"price":"$0.40800","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/2e8567ad04842692d5fb8309c69e90b6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL431QD/alternatives.json"},"ai":{"faq":[{"question":"What is the TL431QD equivalent or second source?","answer":"The TL431QD is a standard adjustable shunt reference; many manufacturers offer pin-compatible 431-type devices. The LM4132AMF-4.1/NOPB is a fixed-output series reference with tighter tolerance (±0.05%) but a different topology (series vs. shunt) and lower output current (20 mA), so it is not a direct functional replacement for the TL431QD's shunt-regulator role."},{"question":"What is the TL431QD tolerance and output voltage range?","answer":"The TL431QD has a ±2.2% tolerance on the 2.495 V internal reference, and the output can be adjusted from 2.495 V up to 36 V using two external resistors."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL431QD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL431QD when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}