{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BC817K-25WH6433","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BC817K-25WH6433","canonicalUrl":"https://icboms.com/infineon/BC817K-25WH6433","factsUrl":"https://icboms.com/api/mcp/products/BC817K-25WH6433","rawCanonicalId":null},"summary":{"shortDescription":"Infineon BC817K-25WH6433 NPN bipolar junction transistor, Automotive AEC-Q101 qualified, 45 V Vceo, 500 mA Ic, DC current gain 160-250 at 100 mA, 170 MHz transition frequency, 500 mW power dissipation, in SC-70/SOT-323 surface-mount package.","salesMarkdown":"## Automotive-grade NPN small-signal transistor in SOT-323 The Infineon BC817K-25WH6433 is an NPN bipolar junction transistor qualified to AEC-Q101, aimed at automotive and industrial applications where a known reliability level is required. It delivers a collector-emitter breakdown voltage of 45 V and can handle a continuous collector current of 500 mA, making it suitable for driving relays, solenoids, and low-power loads in 12 V or 24 V vehicle systems. The device is housed in a PG-SOT323-3-1 surface-mount package (SC-70/SOT-323 footprint), with a maximum power dissipation of 500 mW. ## Gain bracket and switching performance The -25 suffix denotes a DC current gain (hFE) range of 160 to 250 at a test condition of 100 mA collector current and 1 V Vce. This gain band is a common choice for medium-drive switching and linear pre-driver stages where a predictable current gain is needed without the wider spread of the -16 or -40 grades. The 170 MHz transition frequency is adequate for switching applications up to a few megahertz and for analog amplification in audio or sensor signal paths. Saturation voltage is specified at 700 mV maximum when driven with 50 mA base current into a 500 mA collector load, which is typical for a 45 V NPN of this die size. ## Lifecycle and compliance The AEC-Q101 qualification covers automotive-grade stress tests including high-temperature reverse bias, temperature cycling, and humidity. RoHS compliance is standard for Infineon's lead-free product lines; no separate lead-free certification is required for ordering.","metaTitle":"BC817K-25WH6433 NPN Transistor, 45 V, 500 mA, AEC-Q101","metaDescription":"BC817K-25WH6433 NPN bipolar transistor, 45 V Vceo, 500 mA Ic, hFE 160-250 at 100 mA, 170 MHz fT, AEC-Q101 qualified in SOT-323. Available to order.","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":"SC-70, SOT-323","Product Status":"Active","lifecycle_stage":"eol_hot","Operating Temperature":"150°C(TJ)","Frequency - Transition":"170MHz","Supplier Device Package":"PG-SOT323-3-1","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":"160 @ 100mA, 1V","Voltage - Collector Emitter Breakdown (Max)":"45 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.0400","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b4e378390df63bd31f55c7981ea55926.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is BC817K-25WH6433 equivalent to BC817-25?","answer":"The BC817K-25WH6433 is Infineon's AEC-Q101 qualified version of the standard BC817-25. The gain bracket and electrical parameters (45 V Vceo, 500 mA Ic, hFE 160-250) are the same, but the K-25WH6433 variant adds automotive-level reliability screening. For non-automotive designs, the commercial BC817-25 is a functional equivalent; for automotive BOMs, use the K-suffix part to maintain the qualification trace."},{"question":"What is the SMD marking for BC817K-25WH6433?","answer":"Standard Infineon marking for the BC817K-25WH6433 in the SOT-323 package is typically a two-character code; consult the product marking specification for the exact top mark as it may vary by date code and assembly site."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BC817K-25WH6433","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BC817K-25WH6433 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}}