{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STD1802T4-A","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STD1802T4-A","canonicalUrl":"https://icboms.com/stmicroelectronics/STD1802T4-A","factsUrl":"https://icboms.com/api/mcp/products/STD1802T4-A","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STD1802T4-A NPN bipolar junction transistor, 60 V Vceo, 3 A Ic, 150 MHz fT, 400 mV Vce(sat) at 3 A, DPAK surface-mount package, 15 W max power dissipation, 150°C junction temperature.","salesMarkdown":"Its 150 MHz transition frequency confirms it is a switching device, not a linear amplifier — the 400 mV max Vce(sat) at 3 A keeps conduction losses within the 15 W power dissipation ceiling of the DPAK footprint. The 150°C junction temperature rating gives thermal headroom for enclosed or warm-environment designs, but the 100 nA collector cutoff at 60 V means off-state leakage is negligible for most loads. For a BOM line that currently specifies this transistor, the immediate decision is whether to place a last-time-buy quantity to cover the remaining production run, or to qualify a pin-compatible replacement before the window closes. The base product number STD1802 covers the broader family, so a sibling variant within the same die family may still be active — verify the exact suffix against current lifecycle data before committing a last-time-buy volume. ## Package and thermal reality — DPAK on a production board The DPAK (TO-252-3, two leads plus tab) is a surface-mount power package that relies on the exposed drain tab for thermal dissipation. The 15 W power max is achievable only with adequate copper area on the PCB — a standalone footprint without a thermal via stitch under the tab will derate that number significantly. For a 3 A continuous load at 400 mV Vce(sat), the conduction loss is about 1.2 W, which is manageable with a reasonable copper pour.","metaTitle":"STD1802T4-A NPN Transistor, 60 V 3 A, 150 MHz, DPAK","metaDescription":"STD1802T4-A NPN bipolar transistor: 60 V Vceo, 3 A Ic, 150 MHz fT, 400 mV Vce(sat) at 3 A. DPAK surface mount.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Last Buy","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"-","Package":"Tape & Reel (TR) Cut Tape (CT)","Power - Max":"15 W","Mounting Type":"Surface Mount","Package / Case":"TO-252-3, DPak (2 Leads + Tab), SC-63","Product Status":"Last Time Buy","Transistor Type":"NPN","lifecycle_stage":"eol_hot","Base Product Number":"STD1802","Operating Temperature":"150°C (TJ)","Frequency - Transition":"150MHz","Supplier Device Package":"DPAK","Vce Saturation (Max) @ Ib, Ic":"400mV @ 150mA, 3A","Current - Collector (Ic) (Max)":"3 A","Current - Collector Cutoff (Max)":"100nA (ICBO)","DC Current Gain (hFE) (Min) @ Ic, Vce":"200 @ 100mA, 2V","Voltage - Collector Emitter Breakdown (Max)":"60 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.4000","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STD1802T4-A/alternatives.json"},"ai":{"faq":[{"question":"Is STD1802T4-A obsolete?","answer":"The STD1802T4-A is not yet obsolete but carries a Last Buy status. This means the manufacturer has announced a final order window — after that window closes, the part will no longer be produced. For a current BOM, you should either place a last-time-buy order or qualify a replacement before the window expires."},{"question":"What is the maximum collector current of STD1802T4-A?","answer":"The maximum continuous collector current (Ic) is 3 A. The collector-emitter breakdown voltage is 60 V, and the Vce(sat) is 400 mV max at 3 A with 150 mA base drive."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STD1802T4-A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STD1802T4-A 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}}