{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STF826","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STF826","canonicalUrl":"https://icboms.com/stmicroelectronics/STF826","factsUrl":"https://icboms.com/api/mcp/products/STF826","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STF826 PNP bipolar junction transistor, 30 V Vceo, 3 A Ic, 100 MHz transition frequency, 1.4 W max power, SOT-89-3 surface-mount package.","salesMarkdown":"The STF826 is a PNP bipolar power transistor from STMicroelectronics, rated for 30 V collector-emitter breakdown and 3 A continuous collector current. The SOT-89-3 package keeps the footprint small while the 1.4 W maximum power dissipation handles moderate heat loads when the board copper is sized correctly. The STF826 is listed as obsolete. ## Package and mounting — SOT-89-3 The STF826 is supplied in a TO-243AA (SOT-89-3) surface-mount package. The three-lead footprint is common across many small-signal power transistors, which helps when evaluating second-source candidates. ## Key ratings and the decisions they drive The 30 V Vceo sets the maximum rail voltage — stay below that with margin for transients. The 3 A collector rating is continuous; peak currents in switching applications need to respect the 1.4 W power limit and the thermal resistance of the SOT-89-3 pad. Vce(sat) of 1.1 V at 3 A is typical for a PNP of this size; it means the on-state voltage drop will dissipate over 3 W at full current, so the duty cycle and heatsinking must be checked. The 100 MHz transition frequency is adequate for switching up to a few megahertz, but the gain roll-off at higher collector currents should be verified against the datasheet curves if operating near the 3 A limit.","metaTitle":"STF826 PNP Transistor, 30 V, 3 A, SOT-89-3, Obsolete","metaDescription":"STF826 PNP bipolar transistor, 30 V Vceo, 3 A Ic, 100 MHz fT, SOT-89-3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Power - Max":"1.4 W","Mounting Type":"Surface Mount","Package / Case":"TO-243AA","Product Status":"Obsolete","Transistor Type":"PNP","lifecycle_stage":"eol_hot","Base Product Number":"STF826","Operating Temperature":"150°C(TJ)","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":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STF826/alternatives.json"},"ai":{"faq":[{"question":"Is STF826 obsolete?","answer":"Yes, the STF826 is listed as obsolete by STMicroelectronics."},{"question":"What is the replacement for STF826?","answer":"For a pin-compatible alternative, evaluate other PNP transistors in SOT-89-3 with similar 30 V, 3 A ratings from the same or alternate manufacturers."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STF826","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STF826 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}}