{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BC 817-25W E6433","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BC-817-25W-E6433","canonicalUrl":"https://icboms.com/infineon/BC-817-25W-E6433","factsUrl":"https://icboms.com/api/mcp/products/BC%20817-25W%20E6433","rawCanonicalId":null},"summary":{"shortDescription":"Infineon BC 817-25W E6433 NPN transistor, 45 V VCEO, 500 mA Ic, 170 MHz fT, hFE 160-400 at 100 mA, SOT-323 package, 250 mW power dissipation.","salesMarkdown":"The Infineon BC 817-25W E6433 is an NPN general-purpose transistor in a SOT-323 (SC-70) surface-mount package. It is rated for 45 V collector-emitter breakdown and 500 mA continuous collector current, with a minimum DC current gain of 160 at 100 mA and a transition frequency of 170 MHz. ## Parametric profile and application fit With a 45 V VCEO and 500 mA Ic rating, this transistor suits low-to-medium power switching and amplification roles: relay drivers, LED drivers, signal amplification in audio or control circuits, and general-purpose switching up to a few MHz. The 170 MHz fT supports moderate-speed switching, though for higher-frequency RF applications a dedicated RF transistor would be needed. The SOT-323 footprint is compact, saving board space compared to SOT-23, but the 250 mW power limit means thermal dissipation must be checked in continuous-load designs — derating is required above 25 °C ambient. ## hFE bin and family context The -25W suffix denotes a specific hFE bin: minimum 160 at 100 mA, 1 V, with a typical range of 160 to 400. This is the medium-gain bin in the BC 817 family; the -16W bin offers lower gain (100 min) and the -40W bin higher gain (250 min). For designs requiring a tighter gain window at the operating point, the -25W bin is a common choice. The base part number BC 817 covers multiple package variants (SOT-23, SOT-323, SOT-89) and hFE bins, so a direct replacement must match both the package and the gain grade.","metaTitle":"Infineon BC 817-25W E6433 NPN Transistor, 45 V, 500 mA","metaDescription":"Infineon BC 817-25W E6433 NPN transistor, 45 V VCEO, 500 mA Ic, 170 MHz fT, SOT-323 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":"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":"160 @ 100mA, 1V","Voltage - Collector Emitter Breakdown (Max)":"45 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.0500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/e1198b7a398bf9fcc31ab9c515acedbd.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BC%20817-25W%20E6433/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy BC 817-25W E6433?","answer":"This part is obsolete and not available through standard distribution. We source it through independent surplus and broker channels. Submit an RFQ; we will confirm availability and current pricing at quote time."},{"question":"What is the best replacement for BC 817-25W E6433?","answer":"No official successor is listed. For a new design, consider a current-production NPN transistor in SOT-323 with similar ratings (45 V, 500 mA, hFE ≥ 160 at 100 mA). The BC 817-25W in SOT-23 (if footprint permits) or a different hFE bin (-16W or -40W) may be alternatives, but verify the gain specification against your circuit. We can help identify a suitable cross if you provide the application details."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BC-817-25W-E6433","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BC-817-25W-E6433 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T15:11:38.233Z","lastPublished":"2026-07-16T15:11:38.233Z","indexable":true}}