{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BC817-40E6433","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BC817-40E6433","canonicalUrl":"https://icboms.com/infineon/BC817-40E6433","factsUrl":"https://icboms.com/api/mcp/products/BC817-40E6433","rawCanonicalId":null},"summary":{"shortDescription":"Infineon BC817-40E6433 NPN transistor, Automotive AEC-Q101 series, 45 V Vce, 500 mA Ic, hFE 250 min, 170 MHz fT, SOT-23 surface mount, 150°C junction.","salesMarkdown":"## Automotive-grade NPN in a SOT-23 footprint The Infineon BC817-40E6433 is an NPN general-purpose amplifier and switching transistor rated for automotive and industrial environments, carrying AEC-Q101 qualification. Packaged in the industry-standard SOT-23-3 (PG-SOT23) surface-mount case, it delivers a 45 V collector-emitter breakdown and a 500 mA continuous collector current ceiling. The -40E suffix guarantees a minimum DC current gain (hFE) of 250 at 100 mA collector current — a tight bin that gives the designer predictable saturation margin across the full temperature range. The 250 minimum hFE at 100 mA, 1 Vce means the base drive requirement is low: for a 100 mA load, you need less than 0.4 mA into the base to keep the transistor in the linear region. That simplifies the drive stage — a GPIO from a 3.3 V MCU can often drive it directly through a single resistor. When switching near the 500 mA maximum, the Vce saturation spec of 700 mV max at 50 mA base drive / 500 mA collector current tells you the on-state power dissipation: at 500 mA, figure about 350 mW worst-case, leaving 150 mW headroom before hitting the 500 mW package power limit. That margin shrinks at elevated ambient — derate against the 150°C junction maximum. ## AEC-Q101 — what the automotive grade buys you The AEC-Q101 qualification means this part has passed the Automotive Electronics Council's stress tests for discrete semiconductors: high-temperature reverse bias, temperature cycling, autoclave, and solder heat resistance. For a procurement decision, that certification lifts the part above the commercial BC817-40 variant — it is the version to specify when the BOM requires a PPAP submission or when the end product ships into under-hood or chassis-domain electronics. The 150°C junction temperature rating supports 125°C ambient operation with adequate derating for self-heating. ## Lifecycle and sourcing posture This is a standard catalog transistor that moves through both authorized distribution and the independent spot market. For production runs, qualify it into the BOM with confidence; the AEC-Q101 suffix is the automotive-screened variant, so confirm your tier's paperwork requirements at quote time.","metaTitle":"BC817-40E6433 NPN Transistor, AEC-Q101, 45V, 500mA, SOT-23","metaDescription":"BC817-40E6433 NPN transistor, automotive AEC-Q101 qualified. 45 V Vce breakdown, 500 mA collector current, hFE 250 min at 100 mA.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Infineon Technologies","Series":"Automotive, AEC-Q101","Package":"Bulk","Power - Max":"500 mW","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Product Status":"Active","Transistor Type":"NPN","lifecycle_stage":"eol_hot","Operating Temperature":"150°C(TJ)","Frequency - Transition":"170MHz","Supplier Device Package":"PG-SOT23","Vce Saturation (Max) @ Ib, Ic":"700mV @ 50mA, 500mA","Current - Collector (Ic) (Max)":"500 mA","Current - Collector Cutoff (Max)":"100nA (ICBO)","DC Current Gain (hFE) (Min) @ Ic, Vce":"250 @ 100mA, 1V","Voltage - Collector Emitter Breakdown (Max)":"45 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1c24bb7cd7197872db582b10f9488266.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is BC817-40E6433 AEC-Q101 qualified?","answer":"Yes, the BC817-40E6433 is listed under the Automotive, AEC-Q101 series, meaning it has passed the AEC-Q101 stress tests for automotive-grade discrete semiconductors. This qualification covers high-temperature reverse bias, temperature cycling, autoclave, and solder heat resistance, making it suitable for automotive and high-reliability applications."},{"question":"What is the DC current gain (hFE) of BC817-40E6433 at 100 mA?","answer":"The minimum DC current gain (hFE) is 250 at a collector current of 100 mA with a collector-emitter voltage of 1 V. This tight bin ensures predictable drive requirements and saturation behavior across temperature."},{"question":"What is the maximum operating temperature of BC817-40E6433?","answer":"The maximum operating junction temperature is 150°C. This is the junction temperature limit, not the ambient — derate the power dissipation (500 mW package limit) against the thermal resistance of the SOT-23 package to stay within the 150°C ceiling."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BC817-40E6433","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BC817-40E6433 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}}