{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BCR146","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BCR146","canonicalUrl":"https://icboms.com/infineon/BCR146","factsUrl":"https://icboms.com/api/mcp/products/BCR146","rawCanonicalId":null},"summary":{"shortDescription":"Infineon BCR146, Automotive AEC-Q101 NPN Pre-Biased Transistor, 50 V VCEO, 70 mA IC, 150 MHz fT, 200 mW, SOT-23-3 package.","salesMarkdown":"## AEC-Q101 pre-biased NPN in SOT-23 — what it is The Infineon BCR146 is an automotive-grade NPN pre-biased transistor in a SOT-23-3 package. It integrates two bias resistors — 47 kΩ on the base (R1) and 22 kΩ on the emitter-base (R2) — so you can drop it into a switching circuit without external resistors. Rated for 50 V collector-emitter breakdown and 70 mA continuous collector current, it handles the kind of low-power loads you find in automotive relay pre-drivers, lamp check circuits, and logic-level interfaces. The AEC-Q101 qualification (Series Automotive, AEC-Q101) means it's characterised and tested for the under-hood or cabin environment, not just a commercial-grade part with a sticker. ## Built-in resistors — one fewer component per node The 47 kΩ base resistor and 22 kΩ emitter-base resistor set the transistor's turn-on threshold and speed. For a 5 V logic drive, the base current is roughly (5 V - 0.7 V) / 47 kΩ ≈ 91 µA, which with a minimum DC current gain of 50 at 5 mA collector current gives you plenty of saturation margin. The 22 kΩ resistor across the base-emitter junction speeds turn-off by shunting stored charge — useful in pulsed or PWM applications where you need clean edges. The Vce(sat) of 300 mV at 500 µA base and 10 mA collector is tight enough for low-drop switching. ## Sourcing and lifecycle — active, automotive-qualified It's a current-production part, so there's no last-time-buy pressure. If you're stocking for a long-life automotive program, this is a part you can plan around without worrying about an imminent EOL notice.","metaTitle":"BCR146 NPN Pre-Biased Transistor, AEC-Q101, 50 V, 70 mA","metaDescription":"BCR146 automotive AEC-Q101 NPN pre-biased transistor. 50 V VCEO, 70 mA IC, 150 MHz fT. Built-in 47 kΩ / 22 kΩ resistors. SOT-23 package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Infineon Technologies","Series":"Automotive, AEC-Q101","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)":"47 kOhms","Frequency - Transition":"150 MHz","Supplier Device Package":"PG-SOT23-3-3","Resistor - Emitter Base (R2)":"22 kOhms","Vce Saturation (Max) @ Ib, Ic":"300mV @ 500µA, 10mA","Current - Collector (Ic) (Max)":"70 mA","Current - Collector Cutoff (Max)":"100nA (ICBO)","DC Current Gain (hFE) (Min) @ Ic, Vce":"50 @ 5mA, 5V","Voltage - Collector Emitter Breakdown (Max)":"50 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.0300","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/ef607ee08560f7bf86b0ad47cfca7f7f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the BCR146 equivalent or closest alternative?","answer":"The BCR135 is a common cross-shop candidate in the same Infineon pre-biased NPN family. The BCR146 uses a 47 kΩ base resistor and 22 kΩ emitter-base resistor; the BCR135 uses different resistor values (10 kΩ / 10 kΩ). Check your drive voltage and required base current — the BCR146 suits higher-impedance drive conditions. Both are AEC-Q101 qualified in SOT-23."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BCR146","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BCR146 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}}