{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STF817A","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STF817A","canonicalUrl":"https://icboms.com/stmicroelectronics/STF817A","factsUrl":"https://icboms.com/api/mcp/products/STF817A","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STF817A PNP transistor, 80 V Vceo, 1.5 A Ic, 50 MHz ft, 1.4 W, SOT-89-3, -65 to 150 °C.","salesMarkdown":"The 80 V Vceo gives headroom for 48 V or 60 V rails in medium-voltage switching and linear applications — motor drives, solenoid drivers, and power-supply pass elements. The 1.5 A Ic rating suits loads up to about 1 A continuous with margin, typical for relay pre-drivers, LED string switches, and small DC motor controls. The 500 mV Vce(sat) at 100 mA base current and 1 A collector current is a moderate saturation voltage; for higher-efficiency switching, a lower-Vce(sat) part might be preferred, but for general-purpose medium-current PNP switching this is a common fit. Housed in the SOT-89-3 package (TO-243AA), the STF817A is a surface-mount device with a small footprint and a tab for heat transfer to the PCB copper. The 1.4 W power dissipation limit is the package-level ceiling — derate according to the thermal resistance of the board layout for continuous operation above about 500 mW.","metaTitle":"STF817A PNP Transistor, 80 V, 1.5 A, SOT-89-3, Obsolete","metaDescription":"STF817A PNP transistor, 80 V Vceo, 1.5 A Ic, 50 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":"STF817","Operating Temperature":"-65°C~150°C(TJ)","Frequency - Transition":"50MHz","Supplier Device Package":"SOT-89-3","Vce Saturation (Max) @ Ib, Ic":"500mV @ 100mA, 1A","Current - Collector (Ic) (Max)":"1.5 A","Current - Collector Cutoff (Max)":"1mA","DC Current Gain (hFE) (Min) @ Ic, Vce":"30 @ 1A, 2V","Voltage - Collector Emitter Breakdown (Max)":"80 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0400","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/9127e681d61947d3b92c41bafbf91f6d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the replacement for STF817A?","answer":"STMicroelectronics has not published an official direct replacement for the STF817A. For a pin-compatible PNP transistor in the SOT-89-3 package with similar ratings (80 V, 1.5 A), you would need to evaluate alternatives from other manufacturers — for example, the Diodes Inc. FMMT718 or ON Semiconductor NSS35200MR6T1G — but these are not drop-in replacements without verifying the pinout, hFE, and saturation characteristics against your design. We can help cross-reference against your specific requirements as part of an RFQ."},{"question":"Where can I buy STF817A?","answer":"The STF817A is obsolete, so standard distributor stock is exhausted. Submit an RFQ for current availability and pricing — we confirm both at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STF817A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STF817A 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}}