{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BD140-16","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"BD140-16","canonicalUrl":"https://icboms.com/stmicroelectronics/BD140-16","factsUrl":"https://icboms.com/api/mcp/products/BD140-16","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics BD140-16, PNP bipolar transistor, 80 V Vce breakdown, 1.5 A collector current, 1.25 W max dissipation, TO-225AA (SOT-32) through-hole package.","salesMarkdown":"## 80 V PNP for medium-current linear and switching stages The BD140-16 is a PNP bipolar power transistor rated for 80 V collector-emitter breakdown and 1.5 A continuous collector current, housed in a TO-225AA (SOT-32) through-hole package. It is part of the BD140 series from STMicroelectronics, a complementary pair to the NPN BD135 series, and is commonly used in medium-voltage linear regulators, relay and solenoid drivers, audio output stages, and general-purpose switching up to a few amps. ## 1.25 W dissipation — heatsinking required above a few hundred mA Maximum power dissipation is 1.25 W, which sets the thermal budget for the TO-225AA package. At 1.5 A collector current, the Vce(sat) of 500 mV at 50 mA base drive (Ib=50 mA, Ic=500 mA) gives a conduction loss of 0.25 W at that point — but at full rated current the drop will be higher, and the junction-to-ambient thermal resistance of the TO-225AA (typically around 100 °C/W without a heatsink) means continuous operation above a few hundred mA requires a clip-on or bolted heatsink. ## DC current gain floor: hFE min 40 at 2 V, 150 mA The minimum DC current gain is 40 at Vce=2 V and Ic=150 mA, which is the typical bias point for linear regulator pass elements and audio driver stages. This hFE floor means the base drive current needed for a 1 A load is at least 25 mA — within the output capability of most op-amps and driver ICs. The 100 nA collector cutoff current (ICBO) at 150 °C junction is low enough not to affect bias stability in most designs, though leakage doubles roughly every 10 °C rise. ## Through-hole TO-225AA — board assembly fit The 0.100-inch (2.54 mm) lead pitch is standard for stripboard and prototyping, and the package body is compatible with most TO-126 footprints. For production, the through-hole mounting means wave soldering or hand-soldering — no reflow profile needed, but the leads must be clinched or the part mechanically secured before solder. The tab is collector-connected, so if a heatsink is used, an insulating washer and thermal compound are required unless the heatsink is electrically floating.","metaTitle":"BD140-16 PNP Transistor, 80V 1.5A, TO-225AA Through Hole","metaDescription":"BD140-16 PNP bipolar transistor, 80 Vce, 1.5 A Ic, 1.25 W in TO-225AA (SOT-32) through-hole package. Active production, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"-","Package":"Tube","Power - Max":"1.25 W","Mounting Type":"Through Hole","Package / Case":"TO-225AA, TO-126-3","Product Status":"Active","Transistor Type":"PNP","lifecycle_stage":"eol_hot","Base Product Number":"BD140","Operating Temperature":"150°C (TJ)","Frequency - Transition":"-","Supplier Device Package":"SOT-32","Vce Saturation (Max) @ Ib, Ic":"500mV @ 50mA, 500mA","Current - Collector (Ic) (Max)":"1.5 A","Current - Collector Cutoff (Max)":"100nA (ICBO)","DC Current Gain (hFE) (Min) @ Ic, Vce":"40 @ 2V, 150MA","Voltage - Collector Emitter Breakdown (Max)":"80 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4000","priceTiers":[{"qty":1,"price":"$0.40000","currency":"USD"},{"qty":10,"price":"$0.34200","currency":"USD"},{"qty":100,"price":"$0.23770","currency":"USD"},{"qty":500,"price":"$0.18556","currency":"USD"},{"qty":1000,"price":"$0.15082","currency":"USD"},{"qty":2000,"price":"$0.13482","currency":"USD"},{"qty":5000,"price":"$0.12797","currency":"USD"},{"qty":10000,"price":"$0.11883","currency":"USD"},{"qty":50000,"price":"$0.11313","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/2b4c847b4457cf87649f8f90311a78a9.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BD140-16/alternatives.json"},"ai":{"faq":[{"question":"Is BD140-16 a PNP or NPN transistor?","answer":"The BD140-16 is a PNP bipolar junction transistor. It is the complementary PNP type to the NPN BD135 series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/BD140-16","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/BD140-16 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}