{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL431AIZ","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"TL431AIZ","canonicalUrl":"https://icboms.com/stmicroelectronics/TL431AIZ","factsUrl":"https://icboms.com/api/mcp/products/TL431AIZ","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics TL431AIZ, Shunt Voltage Reference, Adjustable Output, ±1% Tolerance, 100 mA Output, 2.495V Min / 36V Max, TO-92-3 Through Hole, -40°C to 105°C, Active, ROHS3.","salesMarkdown":"The part sinks up to 100 mA and requires only 700 µA cathode current to regulate. ## Adjustable output — how the range works The output voltage is set by a resistor divider from the cathode to the reference pin. The minimum fixed voltage is 2.495 V, and the maximum is 36 V. That range covers most low-voltage and mid-voltage regulation needs. The 100 mA output current is the sink capability, not a source: the TL431 pulls current to ground to regulate the voltage across the load and series resistor. For dual-sourcing or a surface-mount alternative, the TL1431ACL5T is a functional second source with ±0.25% tolerance but a narrower temperature range (-20°C to 70°C) and surface-mount package.","metaTitle":"TL431AIZ Shunt Reference, Adjustable 2.495V to 36V, ±1%","metaDescription":"TL431AIZ adjustable shunt voltage reference, 2.495V min output, 36V max, ±1% tolerance, 100 mA output, TO-92-3 through-hole, -40°C to 105°C. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"STMicroelectronics","Series":"-","Package":"Bulk","Tolerance":"±1%","Output Type":"Adjustable","Mounting Type":"Through Hole","Package / Case":"TO-226-3, TO-92-3 (TO-226AA) Formed Leads","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 ~ 105°C (TA)","Voltage - Output (Max)":"36 V","Supplier Device Package":"TO-92-3","Temperature Coefficient":"-","Voltage - Output (Min/Fixed)":"2.495V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4900","priceTiers":[{"qty":1,"price":"$0.49000","currency":"USD"},{"qty":10,"price":"$0.42300","currency":"USD"},{"qty":25,"price":"$0.39520","currency":"USD"},{"qty":100,"price":"$0.31620","currency":"USD"},{"qty":250,"price":"$0.29360","currency":"USD"},{"qty":500,"price":"$0.24842","currency":"USD"},{"qty":1000,"price":"$0.19196","currency":"USD"},{"qty":2500,"price":"$0.17502","currency":"USD"},{"qty":5000,"price":"$0.16373","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/996cef81569de296d9e0e139436fbf9c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL431AIZ/alternatives.json"},"ai":{"faq":[{"question":"What is the equivalent or replacement for TL431AIZ?","answer":"A functional second source with tighter tolerance is the TL1431ACL5T, which offers ±0.25% tolerance but in a surface-mount package and a narrower -20°C to 70°C temperature range. For a direct through-hole replacement, stay within the TL431 family in TO-92."},{"question":"Can TL431AIZ be used as a comparator?","answer":"Yes, the TL431 can function as a low-cost comparator by using the reference pin as the non-inverting input and the cathode as the open-collector output. The switching threshold is the internal 2.495 V reference."},{"question":"How do I adjust the output voltage of TL431AIZ?","answer":"Connect a resistor divider from the cathode to the reference pin. The output voltage Vout = 2.495 V × (1 + R1/R2). Choose R1 and R2 to set the desired voltage within the 2.495 V to 36 V range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/TL431AIZ","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/TL431AIZ 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}}