{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM431BCM3X/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM431BCM3X-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM431BCM3X-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM431BCM3X%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM431BCM3X/NOPB adjustable shunt voltage reference, ±1% tolerance, 2.495V to 37V output, 100 mA output current, SOT-23-3 surface-mount package, 0°C to 70°C operating temperature.","salesMarkdown":"## Output range and current — sizing the feedback divider The adjustable output from 2.495 V to 37 V means this part replaces fixed-voltage zener diodes across a wide range of rail voltages. The 100 mA output current is high for a shunt reference in a SOT-23 — enough to drive an optocoupler LED plus a bias resistor in a feedback loop, or to pull down a slow logic line. Minimum cathode current is 1 mA; design the bias resistor to keep at least that flowing at the lowest input voltage and highest load. ## Package and procurement options The Cut Tape option suits prototype builds and small-batch repairs without committing to a full reel.","metaTitle":"TI LM431BCM3X/NOPB Adjustable Shunt Reference, ±1%, SOT-23-3","metaDescription":"Texas Instruments LM431BCM3X/NOPB adjustable shunt voltage reference. Output 2.495V to 37V, ±1% tolerance, 100 mA output, SOT-23-3 package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Tolerance":"±1%","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Reference Type":"Shunt","lifecycle_stage":"eol_hot","Current - Output":"100 mA","Current - Cathode":"1 mA","Operating Temperature":"0°C ~ 70°C (TA)","Voltage - Output (Max)":"37 V","Supplier Device Package":"SOT-23-3","Temperature Coefficient":"50ppm/°C Typical","Voltage - Output (Min/Fixed)":"2.495V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.89","priceTiers":[{"qty":1,"price":"$0.89000","currency":"USD"},{"qty":10,"price":"$0.79700","currency":"USD"},{"qty":25,"price":"$0.75640","currency":"USD"},{"qty":100,"price":"$0.62120","currency":"USD"},{"qty":250,"price":"$0.58068","currency":"USD"},{"qty":500,"price":"$0.51314","currency":"USD"},{"qty":1000,"price":"$0.40512","currency":"USD"},{"qty":3000,"price":"$0.38219","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/4ef3a660563a4b71824729e57d54e8c7.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM431BCM3X%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"What is the LM431BCM3X/NOPB tolerance?","answer":"±1% initial tolerance."},{"question":"What are alternatives to LM431BCM3X/NOPB?","answer":"The LM4132AMF-4.1/NOPB is a series reference with fixed 4.096 V output, ±0.05% tolerance, and a wider -40°C to 125°C range, but it is a different topology (series vs shunt) and cannot be adjusted. For a pin-compatible shunt alternative, look at other LM431 grade variants in SOT-23-3."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM431BCM3X-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM431BCM3X-NOPB 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}}