{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BCW71","brand":"onsemi","brandSlug":"onsemi","productSlug":"BCW71","canonicalUrl":"https://icboms.com/onsemi/BCW71","factsUrl":"https://icboms.com/api/mcp/products/BCW71","rawCanonicalId":null},"summary":{"shortDescription":"onsemi BCW71 NPN general-purpose transistor, 45 V Vce, 500 mA Ic, 330 MHz ft, SOT-23-3 surface-mount package, Tape & Reel.","salesMarkdown":"## 45 V, 500 mA — the switching ceiling The BCW71 is an NPN transistor rated for 45 V collector-emitter breakdown and 500 mA continuous collector current. That combination covers low-side switching for relays, solenoids, and indicator loads in 12 V and 24 V industrial logic circuits, where the 45 V Vce gives margin above the rail for inductive flyback. ## 330 MHz ft — bandwidth for signal conditioning A transition frequency of 330 MHz makes the BCW71 usable as a preamplifier or buffer up into the VHF band. For a common-emitter stage with a gain of 10, the closed-loop bandwidth lands around 33 MHz — enough for video line drivers, RF envelope detectors, or high-speed comparator front-ends. The 250 mV saturation voltage at 500 µA base, 10 mA collector keeps conduction losses low in saturated switching — the transistor drops under 0.25 V when fully on, which matters for 3.3 V logic where every millivolt of headroom counts. ## SOT-23-3 — footprint and thermal budget Housed in the industry-standard SOT-23-3 package (TO-236-3 / SC-59 variant), the BCW71 shares the same 2.9 mm × 1.3 mm footprint as thousands of other small-signal transistors. Surface-mount assembly with Tape & Reel or Cut Tape packaging; the SOT-23-3 lands on a standard 0.95 mm pitch pad layout and reflows with any lead-free profile that peaks below 260 °C. No pin-compatible second-source is published by onsemi, but the SOT-23-3 footprint accepts many functionally equivalent NPN types if a cross-reference is needed.","metaTitle":"onsemi BCW71 NPN Transistor, 45V, 0.5A, SOT-23-3","metaDescription":"onsemi BCW71 NPN transistor, 45 V Vce, 500 mA Ic, 330 MHz ft, SOT-23-3 package. Active production. Order BCW71 online, RFQ for volume pricing.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Signal Isolation"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Power - Max":"350 mW","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Transistor Type":"NPN","lifecycle_stage":"eol_hot","Operating Temperature":"-55°C ~ 150°C (TJ)","Frequency - Transition":"330MHz","Supplier Device Package":"SOT-23-3","Vce Saturation (Max) @ Ib, Ic":"250mV @ 500µA, 10mA","Current - Collector (Ic) (Max)":"500 mA","Current - Collector Cutoff (Max)":"100µA (ICBO)","DC Current Gain (hFE) (Min) @ Ic, Vce":"110 @ 2mA, 5V","Voltage - Collector Emitter Breakdown (Max)":"45 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.41","stockQuantity":28,"priceTiers":[{"qty":1,"price":"$0.45000","currency":"USD"},{"qty":10,"price":"$0.33700","currency":"USD"},{"qty":100,"price":"$0.19060","currency":"USD"},{"qty":500,"price":"$0.12624","currency":"USD"},{"qty":1000,"price":"$0.09679","currency":"USD"},{"qty":3000,"price":"$0.08416","currency":"USD"},{"qty":6000,"price":"$0.07575","currency":"USD"},{"qty":15000,"price":"$0.06733","currency":"USD"},{"qty":30000,"price":"$0.06312","currency":"USD"},{"qty":75000,"price":"$0.05597","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/449a2e244bd280735cf86ad7c4ca0c0c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the maximum power dissipation of BCW71?","answer":"The BCW71 is rated for 350 mW maximum power dissipation at 25 °C ambient."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/BCW71","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/BCW71 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}