{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BC 817-40W E6327","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BC-817-40W-E6327","canonicalUrl":"https://icboms.com/infineon/BC-817-40W-E6327","factsUrl":"https://icboms.com/api/mcp/products/BC%20817-40W%20E6327","rawCanonicalId":null},"summary":{"shortDescription":"Infineon BC 817-40W E6327 NPN transistor, 45 V Vceo, 500 mA Ic, 250 hFE min at 100 mA, 170 MHz ft, SC-70 SOT-323 package, 250 mW max power.","salesMarkdown":"The BC 817-40W E6327: The BC 817-40W is listed as obsolete by the manufacturer. That means Infineon has ended production — no last-time-buy window remains open through the franchised channel. The 45 V collector-emitter breakdown voltage (Vceo) is the hard rail limit. The 500 mA maximum collector current sets the load-driving ceiling. The DC current gain (hFE) is the selection parameter that defines the 40-grade bin: a minimum of 250 at 100 mA collector current and 1 V Vce. That high beta means you get good saturation with modest base drive — useful in microcontroller-driven switches where the GPIO can only source a few milliamps. The 170 MHz transition frequency (ft) is adequate for switching up to a few megahertz; for higher-speed pulse applications you would step to a dedicated RF transistor. Maximum power dissipation is 250 mW. In a SOT-323 package that limits continuous collector current to roughly 100–150 mA before junction temperature becomes the constraint — the 500 mA Ic rating is a pulse or low-duty-cycle figure. The 150 °C maximum junction temperature (Tj) is typical for silicon, but the small package means thermal resistance is high; layout with adequate copper pour on the collector pad helps. ## Package and footprint fit The BC 817-40W E6327 comes in an SC-70 (SOT-323) surface-mount package, supplier device package PG-SOT323. That is a three-lead package with a 1.3 mm pitch — compact enough for dense boards but still hand-solderable with care. The collector is the center pin, which is the usual SOT-23 / SOT-323 pinout.","metaTitle":"BC 817-40W E6327 NPN Transistor, 45 V, 500 mA, SC-70","metaDescription":"BC 817-40W E6327 NPN transistor, 45 V Vceo, 500 mA Ic, hFE min 250 at 100 mA. SC-70 SOT-323 package. Request quote.","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":"BC 817","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 BC 817-40W E6327 obsolete?","answer":"Yes, the BC 817-40W E6327 is listed as obsolete by Infineon. Production has ended, and no last-time-buy is available through the franchised channel."},{"question":"What is the replacement for BC 817-40W E6327?","answer":"No official replacement order code is listed by Infineon. For a new design, any active NPN transistor in the BC 817-40 grade (hFE min 250 at 100 mA) in a SOT-323 package with 45 V Vceo and 500 mA Ic is a functional equivalent. The exact pin-compatible alternative depends on the manufacturer — common second sources include Nexperia, ON Semiconductor, and Diodes Inc. parts with the same base number and 40-grade suffix."},{"question":"What are the specifications of BC 817-40W E6327?","answer":"It is an NPN general-purpose transistor. Key ratings: 45 V Vceo, 500 mA Ic max, 250 mW power dissipation, DC current gain (hFE) minimum 250 at 100 mA Ic and 1 V Vce, transition frequency 170 MHz, maximum junction temperature 150 °C. Package: SC-70 (SOT-323). Surface-mount only."},{"question":"Where can I buy BC 817-40W E6327 available via RFQ confirmation?","answer":"This obsolete part is not available through franchised distribution. It is sourced through independent surplus and excess-inventory channels. Submit an RFQ through this listing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BC-817-40W-E6327","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BC-817-40W-E6327 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}}