{"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 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 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. 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 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. 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,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1c24bb7cd7197872db582b10f9488266.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BC817-40E6433/alternatives.json"},"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":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}