{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BCR523E6433HTMA1","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BCR523E6433HTMA1","canonicalUrl":"https://icboms.com/infineon/BCR523E6433HTMA1","factsUrl":"https://icboms.com/api/mcp/products/BCR523E6433HTMA1","rawCanonicalId":null},"summary":{"shortDescription":"Infineon BCR523E6433HTMA1 NPN pre-biased transistor, 500 mA collector current, 50 V Vce breakdown, 100 MHz transition frequency, PG-SOT23 package, Tape & Reel.","salesMarkdown":"The Infineon BCR523E6433HTMA1 is an NPN pre-biased transistor in a PG-SOT23 surface-mount package. It integrates a bias resistor network — 1 kOhm base resistor (R1) and 10 kOhm emitter-base resistor (R2) — eliminating two external resistors from the bill of materials. This makes it a compact, single-component solution for switching and driver stages where the base drive conditions are fixed. With a 500 mA maximum collector current and 50 V collector-emitter breakdown voltage, it handles moderate loads in low-side switching, relay and solenoid drivers, and logic-level interface circuits. The 100 MHz transition frequency supports switching applications up to several megahertz. The 330 mW power dissipation limit in the SOT-23 package means the part is suited for signal-level and low-to-medium power switching, not continuous high-current loads. The 300 mV saturation voltage at 50 mA (with 2.5 mA base drive) keeps conduction losses modest in saturated switching. ## Lifecycle and sourcing reality This part carries a Last Buy lifecycle status. That means the manufacturer has announced end-of-life, and the final production window is closing. Procurement should treat this as a time-limited sourcing event — once the last-time-buy window closes, availability shifts entirely to the surplus and broker channel. The 1 kOhm base resistor and 10 kOhm emitter-base resistor set the turn-on threshold and base current for a given input voltage. At a 3.3 V logic drive, the base current is roughly (3.3 V - 0.7 V) / 1 kOhm = 2.6 mA, which is enough to saturate the transistor at collector currents up to about 180 mA (assuming hFE of 70). For the full 500 mA rating, a higher drive voltage or a lower-value R1 variant is needed. The 100 nA collector cutoff current ensures negligible leakage in the off state at room temperature, important for battery-powered circuits where every microamp counts.","metaTitle":"Infineon BCR523E6433HTMA1 NPN Pre-Biased Transistor, 500 mA","metaDescription":"Infineon BCR523E6433HTMA1 NPN pre-biased transistor, 500 mA Ic, 50 V Vce, 100 MHz fT. Last Buy status.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Last Buy","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Infineon Technologies","Series":"-","Package":"Tape & Reel (TR)","Power - Max":"330 mW","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Product Status":"Last Time Buy","Transistor Type":"NPN - Pre-Biased","lifecycle_stage":"eol_hot","Base Product Number":"BCR523","Resistor - Base (R1)":"1 kOhms","Frequency - Transition":"100 MHz","Supplier Device Package":"PG-SOT23","Resistor - Emitter Base (R2)":"10 kOhms","Vce Saturation (Max) @ Ib, Ic":"300mV @ 2.5mA, 50mA","Current - Collector (Ic) (Max)":"500 mA","Current - Collector Cutoff (Max)":"100nA (ICBO)","DC Current Gain (hFE) (Min) @ Ic, Vce":"70 @ 50mA, 5V","Voltage - Collector Emitter Breakdown (Max)":"50 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.0736","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://www.infineon.com/dgdl/bcr523series.pdf?folderId=db3a30431428a373011440769fd70304&fileId=db3a30431428a3730114407c929c0309","sourceUrl":null},"ai":{"faq":[{"question":"Is BCR523E6433HTMA1 obsolete?","answer":"The BCR523E6433HTMA1 carries a Last Buy lifecycle status, meaning the manufacturer has scheduled end-of-life. It is not yet obsolete, but the final production window is closing."},{"question":"What is the replacement for BCR523E6433HTMA1?","answer":"No official successor is listed for the BCR523E6433HTMA1. The BCR523 base product number covers multiple pre-biased transistor variants with different resistor values; a functionally similar part with the same R1/R2 ratio (1 kOhm / 10 kOhm) in an active lifecycle status may serve as a drop-in alternative, but pinout and package should be verified."},{"question":"Is BCR523E6433HTMA1 compatible with BCR523?","answer":"The BCR523E6433HTMA1 is a specific ordering code within the BCR523 product family. The base number BCR523 refers to the series of NPN pre-biased transistors with various resistor configurations. This variant uses R1 = 1 kOhm and R2 = 10 kOhm. Compatibility depends on whether the other BCR523 variant shares the same resistor values and package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BCR523E6433HTMA1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BCR523E6433HTMA1 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}}