{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BCR166B6327HTLA1","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BCR166B6327HTLA1","canonicalUrl":"https://icboms.com/infineon/BCR166B6327HTLA1","factsUrl":"https://icboms.com/api/mcp/products/BCR166B6327HTLA1","rawCanonicalId":null},"summary":{"shortDescription":"Infineon BCR166B6327HTLA1 PNP pre-biased transistor, 50 V collector-emitter breakdown, 100 mA collector current, 160 MHz transition frequency, PG-SOT23 package.","salesMarkdown":"## What this pre-biased PNP does in a design The Infineon BCR166B6327HTLA1 is a PNP pre-biased transistor — it integrates a 4.7 kOhm base resistor (R1) and a 47 kOhm emitter-base resistor (R2) in a single SOT-23 package. That means you drop the two external resistors normally needed to bias a PNP switch, saving board space and component count in low-current switching and driver stages. With a 50 V collector-emitter breakdown and 100 mA continuous collector current, it handles typical loads like relay coils, small solenoids, LED strings, and logic-level interface circuits in industrial control, consumer appliances, and telecom equipment. ## 160 MHz transition frequency — what it buys you The 160 MHz fT means this transistor can switch cleanly well into the low-MHz range, so it is not limited to DC or line-frequency switching. For PWM dimming of LEDs at tens of kHz or for driving a small transformer in a flyback converter, the transition frequency gives enough gain-bandwidth to keep switching edges sharp and losses low. Infineon has marked the BCR166B6327HTLA1 as obsolete. That means the manufacturer no longer produces it, and no last-time-buy window is open. There is no official Infineon successor listed for this specific variant, so if the design can accommodate a different pre-biased transistor, a pin-compatible alternative from the same BCR166 family (with the same SOT-23 footprint and resistor values) is worth evaluating for new builds.","metaTitle":"BCR166B6327HTLA1 PNP Pre-Biased Transistor, 50 V, 100 mA","metaDescription":"Infineon BCR166B6327HTLA1 PNP pre-biased transistor, 50 V VCEO, 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":"Obsolete","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/ff9460dbb11eebfc33424c0e91bee21f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the replacement for BCR166B6327HTLA1?","answer":"Infineon does not list an official direct replacement for this exact order code. For a drop-in alternative, look for another pre-biased PNP transistor in the BCR166 family with the same 4.7 kOhm base resistor and 47 kOhm emitter-base resistor in a SOT-23 package — the resistor values must match to preserve the bias point. We can help identify a suitable cross when you submit an RFQ."},{"question":"What are the specifications of BCR166B6327HTLA1?","answer":"It is a PNP pre-biased transistor with a 50 V collector-emitter breakdown, 100 mA maximum collector current, 160 MHz transition frequency, and a minimum DC current gain of 70 at 5 mA collector current. It integrates a 4.7 kOhm base resistor and a 47 kOhm emitter-base resistor, and comes in a PG-SOT23 package."},{"question":"What package is BCR166B6327HTLA1?","answer":"The BCR166B6327HTLA1 is supplied in a PG-SOT23 package (also described as TO-236-3 / SC-59 / SOT-23-3), and ships in Tape & Reel."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BCR166B6327HTLA1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BCR166B6327HTLA1 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}}