{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STPS40L40CW","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STPS40L40CW","canonicalUrl":"https://icboms.com/stmicroelectronics/STPS40L40CW","factsUrl":"https://icboms.com/api/mcp/products/STPS40L40CW","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STPS40L40CW, dual common-cathode Schottky rectifier, 40 V reverse, 20 A per diode, 530 mV Vf at 20 A, Fast Recovery ≤ 500 ns, TO-247-3 through-hole package, 150°C max junction temperature.","salesMarkdown":"## 40 V Schottky pair — why the common-cathode matters Each diode is rated for 20 A average rectified current at a 40 V maximum reverse voltage, with a forward voltage drop of 530 mV at 20 A — a low-Vf figure that keeps conduction losses manageable in a center-tap or OR-ing topology. ## 20 A per leg — thermal budget in TO-247-3 At 20 A per diode, the 530 mV Vf produces 10.6 W of conduction loss per leg. The 800 µA reverse leakage at 40 V is a Schottky characteristic that rises sharply with temperature; in a sealed enclosure above 100°C ambient, leakage-induced self-heating can shrink the safe operating area.","metaTitle":"STPS40L40CW Schottky diode, 40 V, 20 A per diode, TO-247-3","metaDescription":"STPS40L40CW dual common-cathode Schottky rectifier, 40 V reverse, 20 A per diode, 530 mV Vf at 20 A, 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","Technology":"Schottky","Mounting Type":"Through Hole","Package / Case":"TO-247-3","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"STPS40","Diode Configuration":"1 Pair Common Cathode","Supplier Device Package":"TO-247-3","Current - Reverse Leakage @ Vr":"800 µA @ 40 V","Voltage - DC Reverse (Vr) (Max)":"40 V","Operating Temperature - Junction":"150°C (Max)","Voltage - Forward (Vf) (Max) @ If":"530 mV @ 20 A","Current - Average Rectified (Io) (per Diode)":"20A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3fcac6c632de37d466d011ba98234b76.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STPS40L40CW/alternatives.json"},"ai":{"faq":[{"question":"Is STPS40L40CW obsolete?","answer":"Yes, the STPS40L40CW is officially Obsolete per STMicroelectronics, with no successor part number provided in the lifecycle record."},{"question":"What is the junction temperature of STPS40L40CW?","answer":"The maximum operating junction temperature is 150°C. This is the thermal ceiling for the die; the TO-247-3 package must be heatsunk to keep the junction below this limit under full 20 A per diode load."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STPS40L40CW","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STPS40L40CW 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}}