{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STPS3L40UFN","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STPS3L40UFN","canonicalUrl":"https://icboms.com/stmicroelectronics/STPS3L40UFN","factsUrl":"https://icboms.com/api/mcp/products/STPS3L40UFN","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STPS3L40UFN Schottky rectifier diode, 40 V reverse voltage, 3 A average forward current, 500 mV forward drop at 3 A, SMA Flat Leads (DO-221AC) package, ECOPACK2 compliant.","salesMarkdown":"## 40 V, 3 A Schottky in a low-profile SMA Flat Leads package The STPS3L40UFN is a Schottky rectifier diode from STMicroelectronics, rated for 40 V DC reverse voltage and 3 A average rectified current. It is housed in the DO-221AC (SMA Flat Leads) package with a SMAflat Notch supplier device package, designed for surface-mount assembly where board height is constrained. The forward voltage drop is specified at 500 mV at 3 A, which keeps conduction losses manageable in low-voltage power rails. The part carries ECOPACK2 compliance for RoHS and environmental requirements. ## Obsolete — planning for replacement The STPS3L40UFN is listed as obsolete. For new designs or BOM sustainment, a form-fit-function replacement in the same SMA Flat Leads footprint and 40 V, 3 A rating class will need to be qualified. The independent distribution channel can still supply this part against an RFQ, but the window for factory-origin stock is closed. ## Reverse leakage and junction temperature limits Reverse leakage current is specified at 100 mA at the rated 40 V reverse voltage — a figure that reflects the Schottky's higher leakage versus a PN-junction diode, important to budget in standby or high-temperature operation. The maximum junction temperature is 150 °C, which sets the thermal derating line for the 3 A forward current in the end system.","metaTitle":"STPS3L40UFN Schottky Diode, 40 V 3 A, SMA Flat Leads","metaDescription":"STPS3L40UFN Schottky rectifier, 40 V reverse voltage, 3 A average current, 500 mV forward drop at 3 A. SMA Flat Leads package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"ECOPACK®2","Package":"Tape & Reel (TR); Cut Tape (CT)","Diode Type":"Schottky","Mounting Type":"Surface Mount","Package / Case":"DO-221AC, SMA Flat Leads","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"STPS3","Capacitance @ Vr, F":"-","Supplier Device Package":"SMAflat Notch","Current - Reverse Leakage @ Vr":"100 mA @ 40 V","Voltage - DC Reverse (Vr) (Max)":"40 V","Current - Average Rectified (Io)":"3A","Operating Temperature - Junction":"150°C","Voltage - Forward (Vf) (Max) @ If":"500 mV @ 3 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.1700","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b44a122dcdea7cdac3b5bab340fa0cf9.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STPS3L40UFN/alternatives.json"},"ai":{"faq":[{"question":"Is STPS3L40UFN obsolete?","answer":"Yes, the STPS3L40UFN is listed as obsolete. No official successor is recorded in the lifecycle data. For replacement, look for a 40 V, 3 A Schottky in the same SMA Flat Leads (DO-221AC) footprint."},{"question":"What is the maximum current and voltage of STPS3L40UFN?","answer":"The maximum DC reverse voltage is 40 V, and the average rectified forward current is 3 A. The forward voltage drop is 500 mV at 3 A."},{"question":"Does STPS3L40UFN have RoHS or environmental compliance?","answer":"Yes, the STPS3L40UFN is part of the ECOPACK2 series, which indicates RoHS compliance and a halogen-free, antimony-free bill of materials per ST's environmental program."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STPS3L40UFN","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STPS3L40UFN 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}}