{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL1431IZ","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"TL1431IZ","canonicalUrl":"https://icboms.com/stmicroelectronics/TL1431IZ","factsUrl":"https://icboms.com/api/mcp/products/TL1431IZ","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics TL1431IZ, adjustable shunt voltage reference, ±0.4% tolerance, 2.5 V to 36 V output, 100 mA cathode current, -40°C to 105°C, through-hole TO-92-3 package, Bulk.","salesMarkdown":"## Adjustable shunt reference for precision regulation loops It sets output voltage anywhere between 2.5 V and 36 V using two external resistors, with an initial tolerance of ±0.4% and a temperature coefficient of 100 ppm/°C. The shunt topology means the device sinks current through the cathode pin — it regulates by shunting current away from the load, not by sourcing it. ## ±0.4% tolerance — what it buys the BOM The TL1431IZ initial tolerance is ±0.4%. ## Industrial temperature range and through-hole packaging","metaTitle":"TL1431IZ Shunt Voltage Reference, ±0.4%, Adjustable 2.5-36V","metaDescription":"STMicroelectronics TL1431IZ adjustable shunt reference, ±0.4% tolerance, 100 mA output, -40°C to 105°C. Active, through-hole TO-92-3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Bulk","Tolerance":"±0.4%","Output Type":"Adjustable","Mounting Type":"Through Hole","Package / Case":"TO-226-2, TO-92-2 (TO-226AC)","Reference Type":"Shunt","lifecycle_stage":"eol_hot","Current - Output":"100 mA","Current - Cathode":"1 mA","Operating Temperature":"-40°C ~ 105°C (TA)","Voltage - Output (Max)":"36 V","Supplier Device Package":"TO-92-3","Temperature Coefficient":"100ppm/°C","Voltage - Output (Min/Fixed)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.06","priceTiers":[{"qty":1,"price":"$1.06000","currency":"USD"},{"qty":10,"price":"$0.94400","currency":"USD"},{"qty":25,"price":"$0.89640","currency":"USD"},{"qty":100,"price":"$0.73630","currency":"USD"},{"qty":250,"price":"$0.68824","currency":"USD"},{"qty":500,"price":"$0.60822","currency":"USD"},{"qty":1000,"price":"$0.52850","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/996cef81569de296d9e0e139436fbf9c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL1431IZ/alternatives.json"},"ai":{"faq":[{"question":"What is the tolerance of TL1431IZ?","answer":"The TL1431IZ has an initial tolerance of ±0.4%, which is tighter than the generic TL431's ±1% or ±2% grades. This makes it suitable for precision voltage references in feedback loops where output accuracy matters."},{"question":"When sourcing TL1431IZ, what's the closest functional second-source — TL1431ACL5T?","answer":"The TL1431ACL5T is a surface-mount variant (SOT-23-5) with a tighter ±0.25% tolerance and a 90 ppm/°C temperature coefficient, but its operating range is limited to -20°C to 70°C. The TL1431IZ covers the industrial temperature range (-40°C to 105°C) in a through-hole TO-92-3 package. Choose the ACL5T for compact, commercial-temperature designs; choose the IZ for industrial environments or when a through-hole footprint is required."},{"question":"Can TL1431IZ replace TL431?","answer":"Yes, the TL1431IZ is pin-compatible with the standard TL431 in the TO-92 package and offers a tighter ±0.4% tolerance versus the TL431's typical ±1% or ±2%. The output voltage range (2.5 V to 36 V) and 100 mA cathode current are the same. For designs that already use a TL431, the TL1431IZ drops in with no board change and improves regulation accuracy."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/TL1431IZ","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/TL1431IZ 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}}