{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BFU520XRR","brand":"NXP Semiconductors","brandSlug":"nxp","productSlug":"BFU520XRR","canonicalUrl":"https://icboms.com/nxp/BFU520XRR","factsUrl":"https://icboms.com/api/mcp/products/BFU520XRR","rawCanonicalId":null},"summary":{"shortDescription":"NXP Semiconductors BFU520XRR NPN RF transistor, 10.5 GHz transition frequency, 20 dB gain, 0.65 dB noise figure at 900 MHz, AEC-Q101 automotive qualified, SOT-143R surface mount package.","salesMarkdown":"## RF performance for LNA and driver stages The BFU520XRR is an NPN RF transistor from NXP, designed for low-noise amplification up to the low-GHz range. Its 10.5 GHz transition frequency and 20 dB gain make it suitable for LNA, driver, and buffer stages in automotive RF systems like tire-pressure monitoring, keyless entry, and telematics modules. The noise figure of 0.65 dB at 900 MHz is the figure of merit for front-end sensitivity — every tenth of a dB directly impacts the receiver's cascaded noise floor. For a 900 MHz ISM-band receiver, this transistor keeps the system NF below 1 dB with proper input matching. ## Automotive-grade reliability and thermal envelope Qualified to AEC-Q101, the BFU520XRR meets the stress, lifetime, and production-control requirements for automotive electronics. Maximum collector current is 30 mA with a collector-emitter breakdown of 12 V. These are the absolute-maximum ratings, not the bias point — the nominal operating region sits well below these limits. The 450 mW power dissipation in the SOT-143R package sets the thermal budget; for a typical LNA biased at 5 V and 10 mA, the 50 mW dissipation leaves ample margin. ## SOT-143R footprint and board integration The SOT-143R package is a four-lead surface-mount footprint with a collector pad that doubles as the thermal path. The PCB layout should follow the recommended land pattern in the NXP application note — the emitter leads are on opposite sides of the package, which simplifies the RF ground via placement for a common-emitter stage.","metaTitle":"NXP BFU520XRR RF Transistor NPN, 10.5GHz, 20dB Gain","metaDescription":"NXP BFU520XRR NPN RF transistor, 10.5 GHz fT, 20 dB gain, 0.65 dB NF at 900 MHz. AEC-Q101 automotive grade. Active production, ROHS3. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Gain":"20dB","Grade":"Automotive","Package":"Tape & Reel (TR); Cut Tape (CT)","Power - Max":"450mW","Mounting Type":"Surface Mount","Qualification":"AEC-Q101","Package / Case":"SOT-143R","Transistor Type":"NPN","lifecycle_stage":"eol_hot","Operating Temperature":"-40°C ~ 150°C (TJ)","Frequency - Transition":"10.5GHz","Supplier Device Package":"SOT-143R","Noise Figure (dB Typ @ f)":"0.65dB @ 900MHz","Current - Collector (Ic) (Max)":"30mA","DC Current Gain (hFE) (Min) @ Ic, Vce":"60 @ 5mA, 8V","Voltage - Collector Emitter Breakdown (Max)":"12V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.47","stockQuantity":16,"priceTiers":[{"qty":1,"price":"$0.47000","currency":"USD"},{"qty":10,"price":"$0.38200","currency":"USD"},{"qty":25,"price":"$0.34960","currency":"USD"},{"qty":100,"price":"$0.26020","currency":"USD"},{"qty":250,"price":"$0.23580","currency":"USD"},{"qty":500,"price":"$0.19514","currency":"USD"},{"qty":1000,"price":"$0.14635","currency":"USD"},{"qty":3000,"price":"$0.13415","currency":"USD"},{"qty":6000,"price":"$0.12602","currency":"USD"},{"qty":15000,"price":"$0.11789","currency":"USD"},{"qty":30000,"price":"$0.10814","currency":"USD"},{"qty":75000,"price":"$0.10407","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/e08be931542963b301ea8ed2ffce4222.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the noise figure of BFU520XRR at 900 MHz?","answer":"The BFU520XRR has a typical noise figure of 0.65 dB at 900 MHz. This low NF makes it a strong candidate for the first LNA stage in a 900 MHz ISM-band receiver, where cascaded noise figure directly sets the system sensitivity."},{"question":"What compliance documentation does NXP provide for BFU520XRR?","answer":"NXP provides the standard compliance declarations; specific REACH, UL, or IEC documentation should be requested through the supply chain at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/nxp/BFU520XRR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/nxp/BFU520XRR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}