{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BCR129WE6327HTSA1","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BCR129WE6327HTSA1","canonicalUrl":"https://icboms.com/infineon/BCR129WE6327HTSA1","factsUrl":"https://icboms.com/api/mcp/products/BCR129WE6327HTSA1","rawCanonicalId":null},"summary":{"shortDescription":"Infineon BCR129WE6327HTSA1 NPN pre-biased digital transistor, 50 V collector-emitter breakdown, 100 mA collector current, 10 kOhm base resistor, 150 MHz transition frequency, SC-70/SOT-323 package, Tape & Reel.","salesMarkdown":"The Infineon BCR129WE6327HTSA1 is an NPN pre-biased digital transistor with a 10 kOhm base resistor integrated on-chip. It is designed for switching and interface applications where the external base resistor would otherwise consume board space and add a component to the pick-and-place bill. The 150 MHz transition frequency is adequate for PWM and serial-data switching up to the low-MHz range. ## 250 mW power limit and the SC-70 thermal reality The 250 mW maximum power dissipation is the package ceiling for the SC-70 / SOT-323 body. In practice, at 50 V Vce and 100 mA Ic the device dissipates 5 W if driven into saturation — so the part is never used near those simultaneous extremes. The 300 mV Vce saturation at 500 µA base current and 10 mA collector current is the operating region: at 10 mA the dissipation is roughly 3 mW, well inside the budget. The 100 nA collector cutoff current tells you the off-state leakage is negligible for battery-powered circuits. Infineon lists the BCR129WE6327HTSA1 as Obsolete. Stock that surfaces on the independent market is new-old-stock or surplus, and date-code provenance matters — verify the marking and the reel date before committing a production run. The base product number BCR129 is the family prefix; any cross-reference to a current-production BCR129 variant should be checked for identical die and resistor values, not just the same package.","metaTitle":"BCR129WE6327HTSA1 NPN Pre-Biased Transistor, 50V 100mA SC-70","metaDescription":"Infineon BCR129WE6327HTSA1 NPN pre-biased transistor, 50V Vce, 100mA Ic, 10kΩ base resistor, 150MHz fT, SC-70/SOT-323.","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 - Pre-Biased","lifecycle_stage":"eol_hot","Base Product Number":"BCR129","Resistor - Base (R1)":"10 kOhms","Frequency - Transition":"150 MHz","Supplier Device Package":"PG-SOT323","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,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3231f9fc17c6083a26de9556ff594490.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BCR129WE6327HTSA1/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for BCR129WE6327HTSA1?","answer":"Infineon does not list a direct successor for the BCR129WE6327HTSA1 in the current BCR129 family. A functionally equivalent pre-biased NPN in SC-70 with a 10 kΩ base resistor and similar 50 V / 100 mA ratings would need to be validated for pin-compatibility and hFE matching. The BCR129 base product number spans multiple resistor configurations; confirm the R1 value and package before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BCR129WE6327HTSA1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BCR129WE6327HTSA1 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}}