{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM309H/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM309H-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM309H-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM309H%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM309H/NOPB, positive fixed linear regulator, 5.05V output, 1A output current, TO-205AD / TO-39-3 metal can package, through-hole mount, 0°C to 125°C operating temperature.","salesMarkdown":"## 1A output — thermal reality check At 1A output, with a typical dropout of 2V or more, the TO-39 metal can will dissipate significant heat. The part includes over-temperature protection, but sustained full-load operation without a heatsink is unlikely at the upper end of the 0°C to 125°C junction range. Plan for a clip-on or bolt-on heatsink if your load draws close to 1A continuously. The quiescent current is 5.2 mA typical, max 10 mA — negligible in most designs, but worth budgeting in battery-powered gear. ## Active production — no LTB risk The LM309H/NOPB is listed as Active on the manufacturer's lifecycle status. ROHS3 compliant. For a classic linear regulator in a hermetic package, that is a solid sourcing position — no need to chase surplus or worry about an imminent EOL.","metaTitle":"LM309H/NOPB Linear Regulator, 5.05V Fixed Output, 1A, TO-39","metaDescription":"Texas Instruments LM309H/NOPB is a positive fixed 5.05V 1A linear regulator in a TO-39 metal can. Active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Box","Output Type":"Fixed","Mounting Type":"Through Hole","Package / Case":"TO-205AD, TO-39-3 Metal Can","lifecycle_stage":"eol_hot","Current - Output":"1A","Protection Features":"Over Temperature","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"0°C ~ 125°C","Voltage - Input (Max)":"25V","Current - Supply (Max)":"10 mA","Supplier Device Package":"TO-3","Current - Quiescent (Iq)":"5.2 mA","Voltage - Output (Min/Fixed)":"5.05V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$19.45","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$19.45000","currency":"USD"},{"qty":10,"price":"$17.87600","currency":"USD"},{"qty":25,"price":"$17.13520","currency":"USD"},{"qty":100,"price":"$15.09750","currency":"USD"},{"qty":250,"price":"$14.35652","currency":"USD"},{"qty":500,"price":"$13.43030","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/7c2d641581be466961df08b001e2ceac.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM309H-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/LM309H-NOPB 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}}