{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BCR129WH6327XTSA1","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BCR129WH6327XTSA1","canonicalUrl":"https://icboms.com/infineon/BCR129WH6327XTSA1","factsUrl":"https://icboms.com/api/mcp/products/BCR129WH6327XTSA1","rawCanonicalId":null},"summary":{"shortDescription":"Infineon BCR129WH6327XTSA1 NPN pre-biased digital transistor, 50 V collector-emitter breakdown, 100 mA collector current, 10 kOhms base resistor, 150 MHz transition frequency, PG-SOT323 package, Tape & Reel.","salesMarkdown":"## What this pre-biased NPN does on the board The Infineon BCR129WH6327XTSA1 is an NPN pre-biased transistor — essentially a switching transistor with a 10 kOhms base resistor built into the same package. That integrated resistor saves one external component and shrinks the footprint, which is why you see these in high-density digital output stages, relay drivers, and logic-level interface circuits where board space is tight. It's rated for 50 V collector-emitter breakdown and 100 mA continuous collector current, with a minimum DC current gain of 120 at 5 mA, 5 V. The 150 MHz transition frequency means it handles modest-speed switching without trouble. This part is in Last Buy status. That means Infineon has issued a last-time-buy notice — the window to place final production orders is closing. If you have an active BOM line using BCR129WH6327XTSA1, the decision is whether to secure lifetime buy stock now or qualify a replacement before supply dries up. ## Package and rework — SC-70 / SOT-323 It comes in a PG-SOT323 package — that's the Infineon designation for the standard SC-70 / SOT-323 three-lead surface-mount package. It's small, about 2.0 mm x 2.1 mm, which is fine for a hand rework station if you've got a fine tip and steady hands. The low thermal mass means it reflows quickly; just watch the hot-air temperature so you don't lift the tiny pads.","metaTitle":"BCR129WH6327XTSA1 NPN Pre-Biased Transistor, 50V, 100mA","metaDescription":"Infineon BCR129WH6327XTSA1 NPN pre-biased transistor in SC-70/SOT-323. 50V VCEO, 100mA IC, 10kΩ base resistor, 150MHz fT.","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":"250 mW","Mounting Type":"Surface Mount","Package / Case":"SC-70, SOT-323","Product Status":"Not For New Designs","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":"$0.0501","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3231f9fc17c6083a26de9556ff594490.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is BCR129WH6327XTSA1 obsolete?","answer":"It is not yet obsolete, but it is in Last Buy status. Infineon has announced a last-time-buy, so the final production window is open but closing. Plan for a lifetime buy or a replacement qualification."},{"question":"What is the maximum collector current of BCR129WH6327XTSA1?","answer":"The maximum continuous collector current is 100 mA. The collector-emitter breakdown voltage is 50 V."},{"question":"What is the replacement for BCR129WH6327XTSA1?","answer":"A pin-compatible alternative within the BCR129 base product number family may exist — check the BCR129 series datasheet for other resistor-divider options in the same SOT-323 package."},{"question":"How does BCR129WH6327XTSA1 compare to BCR135?","answer":"The BCR135 is also an NPN pre-biased transistor in the same SOT-323 package, but it uses a different internal resistor configuration. The BCR129 has a single 10 kOhms base resistor, while the BCR135 typically uses a resistor-divider network (base and base-emitter resistors). Check the specific BCR135 datasheet for its resistor values to confirm fit for your circuit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BCR129WH6327XTSA1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BCR129WH6327XTSA1 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}}