{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BCR 503 B6327","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BCR-503-B6327","canonicalUrl":"https://icboms.com/infineon/BCR-503-B6327","factsUrl":"https://icboms.com/api/mcp/products/BCR%20503%20B6327","rawCanonicalId":null},"summary":{"shortDescription":"Infineon BCR 503 B6327, NPN - Pre-Biased, 500 mA Ic, 50 V Vce, 100 MHz fT, 330 mW, SOT-23-3, Tape & Reel.","salesMarkdown":"The Infineon BCR 503 B6327 is an NPN pre-biased transistor in a SOT-23-3 package. It integrates two 2.2 kOhm resistors — one in series with the base, one between base and emitter — which eliminates the need for external bias components in low-side switching and driver applications. The transistor is rated for a 500 mA collector current and a 50 V collector-emitter breakdown voltage, with a transition frequency of 100 MHz. Typical uses include relay and solenoid drivers, LED switching, and logic-level interface circuits where board space is tight. ## Package and mounting Both R1 (base resistor) and R2 (base-emitter resistor) are 2.2 kOhms. This ratio sets the transistor's turn-on threshold: with a 5 V logic drive, the base current is roughly (5 V - 0.7 V) / 2.2 kOhm ≈ 2 mA, which is enough to saturate the transistor at collector currents up to about 50 mA. The DC current gain minimum is 40 at 50 mA collector current and 5 V Vce, so the integrated resistors are sized for typical digital I/O drive levels. The 100 nA maximum collector cutoff current means the transistor stays firmly off when the base is pulled low.","metaTitle":"BCR 503 B6327 NPN Pre-Biased Transistor, 500 mA, 50 V","metaDescription":"Infineon BCR 503 B6327 NPN pre-biased transistor in SOT-23-3. 500 mA collector current, 50 V breakdown, integrated 2.2 kOhm resistors.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","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","Transistor Type":"NPN - Pre-Biased","lifecycle_stage":"eol_hot","Base Product Number":"BCR 503","Resistor - Base (R1)":"2.2 kOhms","Frequency - Transition":"100 MHz","Supplier Device Package":"PG-SOT23","Resistor - Emitter Base (R2)":"2.2 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":"40 @ 50mA, 5V","Voltage - Collector Emitter Breakdown (Max)":"50 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/43f6e03ae332a53c3a0636b798b6c26e.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the base resistor value for BCR 503?","answer":"Both the base resistor (R1) and the base-emitter resistor (R2) are 2.2 kOhms. This integrated bias network is what makes it a pre-biased transistor, saving two external resistors per switching node."},{"question":"What is the closest pin-compatible equivalent to BCR 503 B6327?","answer":"The BCR 503 is part of Infineon's pre-biased transistor family. Other manufacturers offer functionally equivalent NPN pre-biased transistors in the same SOT-23-3 footprint with 2.2 kOhm / 2.2 kOhm bias resistor networks, but pin assignments should be verified against the specific datasheet before substitution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BCR-503-B6327","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BCR-503-B6327 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}}