{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BCR129E6327","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BCR129E6327","canonicalUrl":"https://icboms.com/infineon/BCR129E6327","factsUrl":"https://icboms.com/api/mcp/products/BCR129E6327","rawCanonicalId":null},"summary":{"shortDescription":"Infineon BCR129E6327 NPN pre-biased transistor, 50 V VCEO, 100 mA Ic, 150 MHz fT, 10 kΩ base resistor, 200 mW, SOT-23-3 package, active.","salesMarkdown":"## Pre-biased NPN in a SOT-23 — what the integrated resistor buys you The Infineon BCR129E6327 is an NPN pre-biased transistor (BRT) that integrates a 10 kΩ base resistor (R1) in the same SOT-23-3 package. That one resistor eliminates an external passive and a pick-and-place step, shrinking the BOM for simple switching loads up to 100 mA collector current and 50 V collector-emitter breakdown. The 150 MHz transition frequency keeps switching losses low in low-speed relay drivers, LED indicators, and logic-level interface circuits. At 200 mW maximum power dissipation in the SOT-23 body, the practical continuous collector current sits well below the 100 mA absolute maximum unless you keep VCE low. For a 5 V rail switching a 50 mA load, the VCE(sat) of 300 mV at 500 µA base drive and 10 mA collector current gives a rough dissipation of 15 mW — plenty of margin. Push toward 100 mA at higher VCE, and the junction temperature climbs fast; the 200 mW limit is the hard ceiling for thermal design.","metaTitle":"BCR129E6327 NPN Pre-Biased Transistor, 100 mA, 50 V, SOT-23","metaDescription":"Infineon BCR129E6327 NPN pre-biased transistor with integrated 10 kΩ base resistor. 100 mA collector current, 50 V VCEO, 200 mW max dissipation.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Infineon Technologies","Series":"-","Package":"Bulk","Power - Max":"200 mW","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Product Status":"Active","Transistor Type":"NPN - Pre-Biased","lifecycle_stage":"eol_hot","Resistor - Base (R1)":"10 kOhms","Frequency - Transition":"150 MHz","Supplier Device Package":"PG-SOT23-3-11","Vce Saturation (Max) @ Ib, Ic":"300mV @ 500µA, 10mA","Current - Collector (Ic) (Max)":"100 mA","Current - Collector Cutoff (Max)":"100nA (ICBO)","DC Current Gain (hFE) (Min) @ Ic, Vce":"120 @ 5mA, 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/0bae00cc91f30b9773243d40a61efc56.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the maximum power dissipation of BCR129E6327?","answer":"The maximum power dissipation is 200 mW. This is the total power the SOT-23 package can dissipate at 25 °C ambient; derate for higher operating temperatures."},{"question":"Can BCR129E6327 be used as a switch?","answer":"Yes — the pre-biased NPN is designed for switching applications. With a 10 kΩ base resistor and a minimum DC current gain of 120 at 5 mA, 5 V, it saturates with a 300 mV VCE(sat) at 500 µA base drive and 10 mA collector current, making it suitable for driving relays, LEDs, and logic-level loads up to 100 mA."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BCR129E6327","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BCR129E6327 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}}