{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STF724","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STF724","canonicalUrl":"https://icboms.com/stmicroelectronics/STF724","factsUrl":"https://icboms.com/api/mcp/products/STF724","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STF724 NPN bipolar junction transistor, 30 V Vceo, 3 A Ic, 100 MHz fT, 1.4 W max, Vce(sat) 1.1 V @ 3 A, in SOT-89-3 (TO-243AA) package, Tape & Reel.","salesMarkdown":"The STMicroelectronics STF724 is a 30 V, 3 A NPN bipolar junction transistor in a surface-mount SOT-89-3 package (TO-243AA). It is a general-purpose power switching transistor rated for a maximum power dissipation of 1.4 W. Typical applications include low-to-moderate current switching loads such as relay and solenoid drivers, DC-DC converter output stages, and linear regulators where the 100 MHz transition frequency provides adequate switching speed for circuits operating up to a few megahertz. The 30 V collector-emitter breakdown voltage and 3 A continuous collector current define the operating envelope. The saturation voltage of 1.1 V at 150 mA base drive and 3 A collector current means conduction losses of about 3.3 W at full rated current — well above the 1.4 W package limit, so continuous operation at 3 A requires derating or pulsed duty. The 100 MHz fT confirms this is a switching transistor, not an RF amplifier; it handles PWM frequencies in the tens to low hundreds of kilohertz comfortably. There is no franchised factory pipeline for this part. The STF724 is supplied in a SOT-89-3 package (JEDEC TO-243AA), a surface-mount power package with a large collector tab on the back side for heat sinking.","metaTitle":"STF724 NPN Transistor, 30 V, 3 A, SOT-89-3, Obsolete","metaDescription":"STF724 NPN bipolar transistor: 30 V Vceo, 3 A Ic, 100 MHz fT, 1.4 W max. SOT-89-3 package. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"-","Package":"Tape & Reel (TR)","Power - Max":"1.4 W","Mounting Type":"Surface Mount","Package / Case":"TO-243AA","Product Status":"Obsolete","Transistor Type":"NPN","lifecycle_stage":"eol_hot","Base Product Number":"STF724","Operating Temperature":"-","Frequency - Transition":"100MHz","Supplier Device Package":"SOT-89-3","Vce Saturation (Max) @ Ib, Ic":"1.1V @ 150mA, 3A","Current - Collector (Ic) (Max)":"3 A","Current - Collector Cutoff (Max)":"100µA","DC Current Gain (hFE) (Min) @ Ic, Vce":"100 @ 100mA, 2V","Voltage - Collector Emitter Breakdown (Max)":"30 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/0b5da19ad65da9c915759f2a87a4b2ed.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STF724/alternatives.json"},"ai":{"faq":[{"question":"What is the equivalent or replacement for STF724?","answer":"No official replacement or second-source part number is listed for the STF724. A functionally similar NPN transistor in a SOT-89-3 package with a 30 V Vceo and 3 A Ic rating may serve as a substitute, but pin compatibility and electrical margins must be verified against the original design. No specific MPN is confirmed as a drop-in replacement."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STF724","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STF724 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}}