{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TTC1949-Y,LF","brand":"Toshiba Semiconductor","brandSlug":"toshiba","productSlug":"TTC1949-YLF","canonicalUrl":"https://icboms.com/toshiba/TTC1949-YLF","factsUrl":"https://icboms.com/api/mcp/products/TTC1949-Y%2CLF","rawCanonicalId":null},"summary":{"shortDescription":"Toshiba Semiconductor TTC1949 series NPN transistor, TTC1949-Y,LF, 50 V Vceo, 500 mA Ic, 200 mW, SOT-23-3 S-Mini, Tape & Reel.","salesMarkdown":"## 50 V, 500 mA general-purpose NPN in SOT-23-3 The TTC1949-Y,LF is a 50 V collector-emitter breakdown, 500 mA collector-current NPN transistor in the standard SOT-23-3 (S-Mini) surface-mount package, rated for 200 mW maximum power dissipation. With a DC current gain (hFE) of 120 minimum at 100 mA collector current and 1 V Vce, it saturates reliably with modest base drive — the 400 mV Vce(sat) at 500 mA is the conduction loss to budget in a 200 mW package. The 100 MHz transition frequency means it switches comfortably into the low-MHz range before gain rolloff limits the edge rate — fine for relay drivers, LED switches, and logic-level translation up to a few hundred kHz. ## Active lifecycle, RoHS flag to watch The part is marked RoHS non-compliant. If your assembly line runs Pb-free reflow profiles, verify the solder-joint reliability at the peak temperature — the SOT-23-3 body handles 150°C junction, but the lead finish may not wet the same as a fully RoHS-compliant part. ## Sourcing and cross-reference The TTC1949-GR,LF carries the same 50 V / 500 mA ratings, same SOT-23-3 package, and same 200 mW power dissipation — the only difference is the hFE bin code (GR vs Y).","metaTitle":"TTC1949-Y,LF Toshiba NPN 50V 0.5A SOT-23-3","metaDescription":"Toshiba TTC1949-Y,LF NPN transistor, 50 V Vceo, 500 mA Ic, 200 mW, SOT-23-3. Active lifecycle. RoHS non-compliant. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Power - Max":"200 mW","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Transistor Type":"NPN","lifecycle_stage":"eol_hot","Operating Temperature":"150°C (TJ)","Frequency - Transition":"100MHz","Supplier Device Package":"S-Mini","Vce Saturation (Max) @ Ib, Ic":"400mV @ 50mA, 500mA","Current - Collector (Ic) (Max)":"500 mA","Current - Collector Cutoff (Max)":"100nA (ICBO)","DC Current Gain (hFE) (Min) @ Ic, Vce":"120 @ 100mA, 1V","Voltage - Collector Emitter Breakdown (Max)":"50 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.31","stockQuantity":23,"priceTiers":[{"qty":1,"price":"$0.31000","currency":"USD"},{"qty":10,"price":"$0.20900","currency":"USD"},{"qty":100,"price":"$0.10220","currency":"USD"},{"qty":500,"price":"$0.08526","currency":"USD"},{"qty":1000,"price":"$0.05924","currency":"USD"},{"qty":3000,"price":"$0.05134","currency":"USD"},{"qty":6000,"price":"$0.04762","currency":"USD"},{"qty":9000,"price":"$0.03949","currency":"USD"},{"qty":30000,"price":"$0.03879","currency":"USD"},{"qty":75000,"price":"$0.03485","currency":"USD"},{"qty":150000,"price":"$0.03020","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/e6f7b2336968dcd373ae167f12b7fba0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional second-source for TTC1949-Y,LF?","answer":"The TTC1949-GR,LF is the same die with a different hFE bin (GR vs Y). It shares the same 50 V Vceo, 500 mA Ic, 200 mW Pd, and SOT-23-3 S-Mini package — a pin-to-pin drop-in, not just footprint-compatible."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/toshiba/TTC1949-YLF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/toshiba/TTC1949-YLF when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}