{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STPS40L15CW","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STPS40L15CW","canonicalUrl":"https://icboms.com/stmicroelectronics/STPS40L15CW","factsUrl":"https://icboms.com/api/mcp/products/STPS40L15CW","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STPS40L15CW, Schottky diode, 1 pair common cathode, 15V Vr, 20A average per diode, 410mV Vf at 19A, Fast Recovery ≤500ns, TO-247-3 through-hole, 125°C max junction.","salesMarkdown":"The STPS40L15CW is a dual common-cathode Schottky rectifier in a TO-247-3 through-hole package. The forward voltage drop is 410 mV at 19 A — low enough to keep conduction losses manageable in a 40 A total output stage. Reverse leakage is 6 mA at the rated 15 V, which is typical for a low-Vf Schottky at this current level and matters if the design idles with the diode reverse-biased at high junction temperature. The recovery speed is listed as fast recovery ≤ 500 ns at > 200 mA, which is standard for a power Schottky — the Schottky barrier itself has no stored charge, so the speed is limited by the package and test circuit parasitics. The 125°C maximum junction temperature is the thermal ceiling; any replacement candidate must match or exceed that for the same heatsinking conditions. ## Where this part was used and what to look for in a substitute A dual 20 A common-cathode Schottky in TO-247-3 is typically found in output rectification for low-voltage, high-current switchmode supplies — think 5 V or 3.3 V rails in telecom rectifiers, server PSUs, or battery charger output stages. The 15 V reverse rating limits it to sub-12 V output rails with adequate derating. The common-cathode configuration is convenient for center-tapped secondary windings or as a pair of OR-ing diodes sharing a heatsink. ## Package and mounting — through-hole only The STPS40L15CW comes in a TO-247-3 through-hole package only. There is no surface-mount variant of this specific part number. The TO-247-3 has a large metal tab for heatsink mounting — plan for a screw or clip attachment and thermal interface material. The through-hole leads are sized for soldering into plated through-holes on a PCB or for wiring to a terminal block in a chassis-mount assembly.","metaTitle":"STPS40L15CW Schottky Diode, 2x20A 15V TO-247-3, Obsolete","metaDescription":"STPS40L15CW dual common-cathode Schottky rectifier, 2x20A average, 15V Vr, 410mV Vf at 19A, TO-247-3.","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":"-","Package":"Tube","Diode Type":"Schottky","Mounting Type":"Through Hole","Package / Case":"TO-247-3","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"STPS40","Diode Configuration":"1 Pair Common Cathode","Supplier Device Package":"TO-247-3","Current - Reverse Leakage @ Vr":"6 mA @ 15 V","Voltage - DC Reverse (Vr) (Max)":"15 V","Operating Temperature - Junction":"125°C(Max)","Voltage - Forward (Vf) (Max) @ If":"410 mV @ 19 A","Current - Average Rectified (Io) (per Diode)":"20A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.7100","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/ac64b71b7859706d7ef3f91d099092cc.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STPS40L15CW/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for STPS40L15CW?","answer":"STMicroelectronics has not published an official direct replacement for the STPS40L15CW in their current product line. A functionally similar part would need to be a dual common-cathode Schottky in TO-247-3, rated for at least 15 V reverse voltage and 20 A per diode, with a forward voltage drop near 410 mV at 19 A. Candidates from other manufacturers exist — the key parametric matches are the 15 V Vr, 20 A average per diode, and TO-247-3 package. No pin-compatible second source is officially cross-referenced in the available records."},{"question":"Does STPS40L15CW come in a surface mount package?","answer":"No. The STPS40L15CW is only available in a through-hole TO-247-3 package."},{"question":"What is STPS40L15CW's listed speed?","answer":"The recovery speed is listed as Fast Recovery ≤ 500 ns at > 200 mA forward current. This is a standard switching speed for a power Schottky diode at this current rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STPS40L15CW","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STPS40L15CW 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}}