{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STPS1L40AY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STPS1L40AY","canonicalUrl":"https://icboms.com/stmicroelectronics/STPS1L40AY","factsUrl":"https://icboms.com/api/mcp/products/STPS1L40AY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STPS1L40AY, Q Automotive series, Schottky rectifier, 40 V Vr, 1 A Io, 500 mV Vf at 1 A, 35 µA Ir at 40 V, DO-214AC SMA, -40°C to 150°C junction.","salesMarkdown":"## 40 V, 1 A Schottky — the automotive-grade rectifier for low-forward-drop rails The STPS1L40AY is an automotive-grade Schottky rectifier from STMicroelectronics' Q Automotive series, rated 40 V reverse voltage and 1 A average forward current in a DO-214AC (SMA) surface-mount package. Its key spec for the BOM is the 500 mV maximum forward voltage at 1 A — that 0.5 V drop at rated current is the conduction-loss floor you budget for in a 1 A rail. The 35 µA reverse leakage at 40 V is the ceiling; at elevated junction temperatures leakage climbs, so the thermal design needs headroom. ## Junction temperature range and the SMA thermal path For a 1 A continuous load at 500 mV Vf, expect about 0.5 W dissipation; the SMA can handle that with adequate board copper, but derate above 100°C junction. ## Active production, AEC-Q101 qualified The Q-series suffix signals AEC-Q101 qualification, so this part is released for automotive PPAP submissions and production. ROHS3 compliant.","metaTitle":"STPS1L40AY Schottky Diode, 40 V, 1 A, SMA, Automotive Grade","metaDescription":"STPS1L40AY automotive Schottky rectifier: 40 V reverse, 1 A forward, 500 mV Vf at 1 A, 35 µA leakage at 40 V. DO-214AC SMA package.","metaKeywords":null},"attributes":{"series":"Q","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"Q Automotive","Package":"Tape & Reel (TR); Cut Tape (CT)","Diode Type":"Schottky","Mounting Type":"Surface Mount","Package / Case":"DO-214AC, SMA","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"STPS1","Capacitance @ Vr, F":"-","Supplier Device Package":"SMA (DO-214AC)","Current - Reverse Leakage @ Vr":"35 µA @ 40 V","Voltage - DC Reverse (Vr) (Max)":"40 V","Current - Average Rectified (Io)":"1A","Operating Temperature - Junction":"-40°C~150°C","Voltage - Forward (Vf) (Max) @ If":"500 mV @ 1 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6400","priceTiers":[{"qty":1,"price":"$0.64000","currency":"USD"},{"qty":10,"price":"$0.54800","currency":"USD"},{"qty":100,"price":"$0.38130","currency":"USD"},{"qty":500,"price":"$0.29770","currency":"USD"},{"qty":1000,"price":"$0.24198","currency":"USD"},{"qty":2000,"price":"$0.21631","currency":"USD"},{"qty":5000,"price":"$0.20531","currency":"USD"},{"qty":10000,"price":"$0.19065","currency":"USD"},{"qty":25000,"price":"$0.18625","currency":"USD"},{"qty":50000,"price":"$0.18150","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/4b88c9fe293cc1732236fda3e5eb92c3.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STPS1L40AY/alternatives.json"},"ai":{"faq":[{"question":"Is STPS1L40AY automotive qualified?","answer":"Yes — the Q Automotive series designation indicates AEC-Q101 qualification, suitable for automotive PPAP and production use in under-hood and chassis-domain applications."},{"question":"What is the maximum reverse leakage current of STPS1L40AY?","answer":"The reverse leakage is 35 µA maximum at 40 V reverse voltage, 25°C junction. Leakage increases with temperature; at the 150°C junction limit it will be significantly higher — budget derating in high-temperature designs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STPS1L40AY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STPS1L40AY 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}}