{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MMBTA92LT1","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"MMBTA92LT1","canonicalUrl":"https://icboms.com/infineon/MMBTA92LT1","factsUrl":"https://icboms.com/api/mcp/products/MMBTA92LT1","rawCanonicalId":null},"summary":{"shortDescription":"ON Semiconductor MMBTA92LT1 PNP bipolar transistor, 300 V collector-emitter breakdown, 500 mA continuous collector current, 360 mW power dissipation, SOT-23-3 surface-mount package, 50 MHz transition frequency.","salesMarkdown":"## 300 V PNP in a SOT-23 — what the ratings mean The MMBTA92LT1 is a PNP transistor in a SOT-23-3 (PG-SOT23) surface-mount package. Its 300 V collector-emitter breakdown voltage and 500 mA collector current rating suit moderate-load driving. ## Where the 300 V rating drives the design The 300 V VCEO is the spec that defines the application envelope. A PNP with this breakdown in a SOT-23 is typically found in offline bias supplies (e.g., the start-up transistor in a flyback converter), high-voltage display drivers (VFD grid or anode switching), or as the high-side pass element in a linear regulator where the input rail runs at 250–280 VDC. The 500 mV Vce(sat) at 20 mA collector current and 2 mA base drive is typical for a high-voltage transistor — the saturation voltage is higher than a logic-level part, so the base overdrive needs budgeting in the drive circuit. The 100 nA maximum collector cutoff current is tight enough for most bias circuits; leakage doubles roughly every 10 °C above 25 °C, so at 125 °C junction it will be in the microamp range. ON Semiconductor has ended production of this specific ordering code. If this part is on your current BOM, you are looking at a last-time-buy or surplus-channel procurement. A functionally equivalent PNP with the same 300 V VCEO and 500 mA IC in SOT-23 would be the starting point for a substitution search, but pin-for-pin compatibility and hFE matching at the operating point must be verified against the original circuit. Because the MMBTA92LT1 is obsolete, the standard authorized-distributor channel no longer stocks it from the factory. Supply is available through independent distribution — surplus inventory, overstock from contract manufacturers, or last-time-buy lots. Every unit should be traced by date code and lot number, and the SOT-23 marking verified against the ON Semiconductor marking specification for the MMBTA92 die. The laser etch on the top of the package is the primary authenticity checkpoint: a re-marked or sanded surface is a counterfeit red flag.","metaTitle":"MMBTA92LT1 PNP Transistor, 300 V, 500 mA, SOT-23","metaDescription":"MMBTA92LT1 PNP transistor in SOT-23-3, 300 V VCEO, 500 mA IC, 360 mW. RFQ for current pricing and availability.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Infineon Technologies","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Power - Max":"360 mW","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Product Status":"Obsolete","Transistor Type":"PNP","lifecycle_stage":"eol_hot","Base Product Number":"MMBTA","Operating Temperature":"150°C(TJ)","Frequency - Transition":"50MHz","Supplier Device Package":"PG-SOT23","Vce Saturation (Max) @ Ib, Ic":"500mV @ 2mA, 20mA","Current - Collector (Ic) (Max)":"500 mA","Current - Collector Cutoff (Max)":"100nA (ICBO)","DC Current Gain (hFE) (Min) @ Ic, Vce":"25 @ 30mA, 10V","Voltage - Collector Emitter Breakdown (Max)":"300 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3500","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/4c495cdd2ada6c387cf246ad316b67e9.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is MMBTA92LT1 obsolete or end-of-life?","answer":"Yes, the MMBTA92LT1 carries an obsolete lifecycle status. ON Semiconductor has discontinued this specific ordering code. There is no official direct replacement listed, so a functionally equivalent PNP transistor with matching 300 V VCEO and 500 mA IC in SOT-23 must be evaluated for the application."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/MMBTA92LT1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/MMBTA92LT1 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}}