{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BCR166E6433HTMA1","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BCR166E6433HTMA1","canonicalUrl":"https://icboms.com/infineon/BCR166E6433HTMA1","factsUrl":"https://icboms.com/api/mcp/products/BCR166E6433HTMA1","rawCanonicalId":null},"summary":{"shortDescription":"Infineon BCR166E6433HTMA1 PNP pre-biased transistor, 50 V Vce, 100 mA Ic, 160 MHz fT, 4.7 kOhms base resistor, 47 kOhms emitter-base resistor, PG-SOT23 package, Tape & Reel.","salesMarkdown":"Infineon has marked the BCR166E6433HTMA1 as obsolete. ## What this pre-biased PNP transistor does The BCR166E6433HTMA1 is a PNP pre-biased transistor — a single switching transistor with two integrated bias resistors (R1 = 4.7 kOhms, R2 = 47 kOhms) built into the same SOT-23 package. That saves a couple of external resistors and shrinks the board footprint for simple low-current switching, level shifting, or driver stages. The 50 V collector-emitter breakdown and 100 mA collector current rating cover typical 5 V or 12 V logic-level loads, and the 160 MHz transition frequency is fast enough for basic PWM or signal inversion up into the low-MHz range. ## Vce saturation and gain — the numbers that matter for switching Vce saturation is specified at 300 mV maximum with a base current of 500 µA and collector current of 10 mA. That is a low-drop switch for a 10 mA load — the transistor stays out of deep saturation, which helps switching speed. Minimum DC current gain is 70 at 5 mA collector current and 5 V Vce, so a 100 µA base drive comfortably saturates a 7 mA load. For higher collector currents up to the 100 mA maximum, budget more base drive and expect higher saturation voltage. ## Package and storage note Housed in a PG-SOT23 package (TO-236 / SC-59 compatible), surface-mount only. Ships in Tape & Reel. Maximum power dissipation is 200 mW — keep the junction temperature in check if running near the current limit continuously. Standard MSL handling applies; store the reels dry if the moisture-barrier bag has been opened.","metaTitle":"BCR166E6433HTMA1 PNP Pre-Biased Transistor, 50 V, 100 mA","metaDescription":"BCR166E6433HTMA1 PNP pre-biased transistor, 50 V Vce, 100 mA Ic, 160 MHz fT, in SOT-23 package.","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":"200 mW","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Product Status":"Not For New Designs","Transistor Type":"PNP - Pre-Biased","lifecycle_stage":"eol_hot","Base Product Number":"BCR166","Resistor - Base (R1)":"4.7 kOhms","Frequency - Transition":"160 MHz","Supplier Device Package":"PG-SOT23","Resistor - Emitter Base (R2)":"47 kOhms","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":"70 @ 5mA, 5V","Voltage - Collector Emitter Breakdown (Max)":"50 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.0474","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/ff9460dbb11eebfc33424c0e91bee21f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What are the alternatives to BCR166E6433HTMA1?","answer":"Infineon's BCR166 family shares the same base part number and pre-biased PNP topology, but the exact R1/R2 ratio (4.7 kOhms / 47 kOhms) and SOT-23 footprint are specific to this variant. A same-function replacement would need matching resistor values and package; check the BCR166 series datasheet for other ratio options if the exact values are not critical."},{"question":"What is the Vce saturation of BCR166E6433HTMA1?","answer":"Maximum Vce saturation is 300 mV at a base current of 500 µA and collector current of 10 mA."},{"question":"Does BCR166E6433HTMA1 come in tape and reel?","answer":"Yes, the BCR166E6433HTMA1 ships in Tape & Reel (TR) packaging."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BCR166E6433HTMA1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BCR166E6433HTMA1 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}}