{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BC817K40WE6327HTSA1","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BC817K40WE6327HTSA1","canonicalUrl":"https://icboms.com/infineon/BC817K40WE6327HTSA1","factsUrl":"https://icboms.com/api/mcp/products/BC817K40WE6327HTSA1","rawCanonicalId":null},"summary":{"shortDescription":"Infineon BC817K40WE6327HTSA1 NPN transistor, 45 V Vce breakdown, 500 mA collector current, 170 MHz transition frequency, hFE 250 min at 100 mA, in SC-70 (SOT-323) surface-mount package, 250 mW power dissipation.","salesMarkdown":"## 45 V, 500 mA general-purpose NPN — now obsolete The Infineon BC817K40WE6327HTSA1 is a general-purpose NPN epitaxial silicon transistor in the SC-70 (SOT-323) surface-mount package. It is rated for a collector-emitter breakdown voltage of 45 V and a continuous collector current of 500 mA, with a power dissipation limit of 250 mW. The DC current gain (hFE) is a minimum of 250 at 100 mA collector current and 1 V Vce, and the transition frequency is 170 MHz. This part is now listed as obsolete by the manufacturer. ## What the 45 V breakdown and 500 mA Ic mean for your design The 45 V Vce breakdown gives comfortable headroom for 24 V and 12 V rails, but the 250 mW power limit in the SC-70 package means the safe operating area is constrained. At 500 mA continuous, Vce(sat) is 700 mV at 50 mA base drive, so the conduction loss in saturation is about 350 mW — above the package's 250 mW rating. For continuous saturation switching, derate the current or pulse the load. The 170 MHz fT is fine for switching up to a few MHz and for audio-frequency amplification. Infineon has marked the BC817K40WE6327HTSA1 as obsolete. There is no official successor listed in the manufacturer's documentation. For BOM lines that still require this exact order code, the remaining stock in the independent distribution channel is the only option. For new designs or long-term production, a pin-compatible alternative in the BC817 family with the same SC-70 footprint should be qualified.","metaTitle":"BC817K40WE6327HTSA1 NPN Transistor, 45 V, 500 mA, SC-70","metaDescription":"Infineon BC817K40WE6327HTSA1 NPN transistor, 45 V Vce, 500 mA Ic, 170 MHz fT, SC-70 package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Infineon Technologies","Series":"-","Package":"Tape & Reel (TR)","Power - Max":"250 mW","Mounting Type":"Surface Mount","Package / Case":"SC-70, SOT-323","Product Status":"Obsolete","Transistor Type":"NPN","lifecycle_stage":"eol_hot","Base Product Number":"BC817","Operating Temperature":"150°C(TJ)","Frequency - Transition":"170MHz","Supplier Device Package":"PG-SOT323","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/e1198b7a398bf9fcc31ab9c515acedbd.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is BC817K40WE6327HTSA1 obsolete?","answer":"Yes, Infineon lists the BC817K40WE6327HTSA1 as obsolete. There is no official manufacturer successor."},{"question":"What is the replacement for BC817K40WE6327HTSA1?","answer":"Infineon has not published a direct replacement for the BC817K40WE6327HTSA1. The BC817 family includes other gain-group and package variants (e.g., BC817-40 in SOT-23), but a pin-compatible SC-70 alternative would need to be qualified on your board. Contact our sourcing team for cross-reference assistance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BC817K40WE6327HTSA1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BC817K40WE6327HTSA1 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}}