{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"QSX8TR","brand":"ROHM Semiconductor","brandSlug":"rohm","productSlug":"QSX8TR","canonicalUrl":"https://icboms.com/rohm/QSX8TR","factsUrl":"https://icboms.com/api/mcp/products/QSX8TR","rawCanonicalId":null},"summary":{"shortDescription":"ROHM QSX8TR dual NPN transistor, 30V Vceo, 1A Ic, 320MHz fT, hFE 270 min @ 100mA, 1.25W, SOT-23-6 Thin / TSOT-23-6, Surface Mount.","salesMarkdown":"## Dual NPN in a compact TSOT-23-6 — what the ratings tell you The ROHM QSX8TR is a dual NPN transistor in a TSOT-23-6 package, rated for 30V collector-emitter breakdown and 1A continuous collector current. With a minimum DC current gain of 270 at 100 mA collector current and 2V Vce, it offers high beta for low-base-current drive — useful when the upstream driver is a 3.3V or 5V logic output with limited sourcing capability. The 320 MHz transition frequency marks it as a fast-switching device suited for DC-DC converter drive, signal-level translation, or pre-driver stages where the dual die saves board area versus two discrete SOT-23s. ## 1.25W in a small footprint — thermal reality The 1.25W maximum power dissipation in the TSOT-23-6 package means the junction-to-ambient thermal path is constrained. At 1A continuous switching, the Vce(sat) of 350 mV at 500 mA gives a rough dissipation of 175 mW per transistor at that point — within the package limit with margin. But if you push both transistors near 1A simultaneously at high duty cycle, the 1.25W ceiling gets tight. The 150°C junction temperature rating is the hard stop; derate the load if the board sees ambient above 85°C. A quick thermal calculation on the combined dissipation against the package rating is the right check before committing the layout.","metaTitle":"QSX8TR Dual NPN Transistor, 30V 1A, 320MHz, TSOT-23-6","metaDescription":"QSX8TR dual NPN transistor: 30V Vceo, 1A Ic, 320MHz fT, hFE min 270 @ 100mA. Active lifecycle, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Power - Max":"1.25W","Mounting Type":"Surface Mount","Package / Case":"SOT-23-6 Thin, TSOT-23-6","Transistor Type":"2 NPN (Dual)","lifecycle_stage":"eol_hot","Operating Temperature":"150°C (TJ)","Frequency - Transition":"320MHz","Supplier Device Package":"TSMT6 (SC-95)","Vce Saturation (Max) @ Ib, Ic":"350mV @ 25mA, 500mA","Current - Collector (Ic) (Max)":"1A","Current - Collector Cutoff (Max)":"100nA (ICBO)","DC Current Gain (hFE) (Min) @ Ic, Vce":"270 @ 100mA, 2V","Voltage - Collector Emitter Breakdown (Max)":"30V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.65","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.65000","currency":"USD"},{"qty":10,"price":"$0.55600","currency":"USD"},{"qty":100,"price":"$0.41550","currency":"USD"},{"qty":500,"price":"$0.32648","currency":"USD"},{"qty":1000,"price":"$0.25228","currency":"USD"},{"qty":3000,"price":"$0.23002","currency":"USD"},{"qty":6000,"price":"$0.21518","currency":"USD"},{"qty":15000,"price":"$0.21000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/63245c20d872ea2eabd1596ab561030f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the hFE of the QSX8TR?","answer":"The minimum DC current gain (hFE) is 270 at a collector current of 100 mA and Vce of 2V. This high beta means the base drive current can be kept low — typically under 1 mA for switching loads in the 100 mA range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/rohm/QSX8TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/rohm/QSX8TR 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}}