{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UA78M33CDCYR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UA78M33CDCYR","canonicalUrl":"https://icboms.com/texas-instruments/UA78M33CDCYR","factsUrl":"https://icboms.com/api/mcp/products/UA78M33CDCYR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UA78M33CDCYR, fixed-output positive LDO regulator, 3.3 V, 500 mA, dropout 2 V max at 350 mA, PSRR 80 dB at 120 Hz, SOT-223-4, 0°C to 125°C.","salesMarkdown":"## Fixed 3.3 V rail for up to 500 mA loads It is built for surface-mount assembly in the SOT-223-4 package (TO-261-4 compatible), with an operating temperature range from 0°C to 125°C. That temperature grade covers most commercial and industrial indoor gear — think PLC analog front-ends, sensor transmitter boards, or the 3.3 V digital rail inside a motor drive control card. Maximum dropout is 2 V at 350 mA load. The 80 dB PSRR at 120 Hz is the ripple-rejection figure that matters when this LDO is cleaning up a rectified line-frequency supply for an analog section. ## Protection set and sourcing posture Built-in over-current, over-temperature, and short-circuit protection mean this regulator can survive a momentary output short without latching off or failing. No external protection diode needed for most loads. There is no LTB notice — this is a current-production line you can commit to a BOM without obsolescence risk.","metaTitle":"UA78M33CDCYR 3.3V 500mA Fixed LDO, SOT-223-4","metaDescription":"UA78M33CDCYR: fixed 3.3 V output, 500 mA, 2 V dropout at 350 mA, 80 dB PSRR at 120 Hz, active status, SOT-223-4.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"PSRR":"80dB (120Hz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-261-4, TO-261AA","lifecycle_stage":"eol_hot","Current - Output":"500mA","Protection Features":"Over Current, Over Temperature, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"0°C ~ 125°C","Voltage - Input (Max)":"25V","Voltage Dropout (Max)":"2V @ 350mA","Supplier Device Package":"SOT-223-4","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.62","priceTiers":[{"qty":1,"price":"$0.62000","currency":"USD"},{"qty":10,"price":"$0.54300","currency":"USD"},{"qty":25,"price":"$0.50960","currency":"USD"},{"qty":100,"price":"$0.41590","currency":"USD"},{"qty":250,"price":"$0.38632","currency":"USD"},{"qty":500,"price":"$0.32880","currency":"USD"},{"qty":1000,"price":"$0.26303","currency":"USD"},{"qty":2500,"price":"$0.23837","currency":"USD"},{"qty":5000,"price":"$0.23264","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/b105c644f302e343adf65ffd8e701eb0.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/UA78M33CDCYR/alternatives.json"},"ai":{"faq":[{"question":"Is UA78M33CDCYR obsolete or active?","answer":"The UA78M33CDCYR is listed as active with no last-time-buy notice. It is a current-production part you can specify into a new BOM without obsolescence concern."},{"question":"What package is UA78M33CDCYR?","answer":"Surface-mount SOT-223-4 (also specified as TO-261-4, TO-261AA)."},{"question":"What is UA78M33CDCYR's PSRR?","answer":"80 dB at 120 Hz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UA78M33CDCYR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UA78M33CDCYR 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}}