{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UA78M33CKCSE3","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UA78M33CKCSE3","canonicalUrl":"https://icboms.com/texas-instruments/UA78M33CKCSE3","factsUrl":"https://icboms.com/api/mcp/products/UA78M33CKCSE3","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UA78M33CKCSE3, fixed 3.3V output, 500mA positive linear regulator, TO-220-3 through-hole package, PSRR 80dB at 120Hz, operating temperature 0°C to 125°C.","salesMarkdown":"## Fixed 3.3 V rail at 500 mA — what it covers The Texas Instruments UA78M33CKCSE3 is a fixed-output 3.3 V linear regulator rated for 500 mA continuous current. It is a single positive regulator in a TO-220-3 through-hole package, designed to supply clean DC rails for logic, MCU, sensor, or small analog circuits where ripple rejection matters. ## Package and mounting — TO-220-3 through-hole The TO-220-3 package has a metal tab for heatsink attachment. The tab is electrically connected to the output pin (pin 2), so a mica insulator or thermal pad is needed if the heatsink is grounded.","metaTitle":"UA78M33CKCSE3 3.3V 500mA Linear Regulator, TO-220-3","metaDescription":"UA78M33CKCSE3 fixed 3.3V output, 500mA linear regulator in TO-220-3. PSRR 80dB at 120Hz. Active lifecycle, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"PSRR":"80dB (120Hz)","Package":"Tube","Output Type":"Fixed","Mounting Type":"Through Hole","Package / Case":"TO-220-3","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":"TO-220-3","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.62","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.62000","currency":"USD"},{"qty":10,"price":"$3.24900","currency":"USD"},{"qty":25,"price":"$3.07200","currency":"USD"},{"qty":100,"price":"$2.66230","currency":"USD"},{"qty":250,"price":"$2.52576","currency":"USD"},{"qty":500,"price":"$2.26636","currency":"USD"},{"qty":1000,"price":"$1.93200","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/b105c644f302e343adf65ffd8e701eb0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to the UA78M33CKCSE3?","answer":"Within the same 78M33 family, the UA78M33CKCS (non-ROHS) and UA78M33CKVUR (surface-mount D2PAK) share the same 3.3 V fixed output and 500 mA rating but differ in package or compliance. For a direct TO-220-3 drop-in, the UA78M33CKCSE3 is the current ROHS3-compliant version."},{"question":"What is the PSRR of the UA78M33CKCSE3?","answer":"The PSRR is 80 dB at 120 Hz, which attenuates 120 Hz ripple from a rectified line by a factor of 10,000 — suitable for powering noise-sensitive analog or mixed-signal circuits."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UA78M33CKCSE3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UA78M33CKCSE3 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}}