{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STPS40L45CG","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STPS40L45CG","canonicalUrl":"https://icboms.com/stmicroelectronics/STPS40L45CG","factsUrl":"https://icboms.com/api/mcp/products/STPS40L45CG","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STPS40L45CG, Schottky Diode, 1 Pair Common Cathode, 45 V, 20 A per diode, 530 mV forward drop, D2PAK surface mount, Tape & Reel.","salesMarkdown":"## What this Schottky pair is and where it goes The STPS40L45CG is a dual Schottky rectifier from STMicroelectronics, configured as a common-cathode pair in a single D2PAK surface-mount package. The low forward drop of 530 mV at 20 A keeps conduction losses down in high-current output rectification stages — think switch-mode power supply secondaries, OR-ing diodes in redundant power feeds, and freewheeling clamps in DC-DC converters. The common-cathode layout pairs naturally with centre-tapped transformer windings or as two independent diodes sharing the same output rail. ST lists the STPS40L45CG as obsolete. If this part is on your BOM, you are looking at last-time-buy inventory that is already in the field or surplus stock held by independent distributors. For a production line that still needs this footprint and current rating, the only path is sourcing from the open market — and that means verifying date codes, storage condition, and authenticity before the reels hit the pick-and-place. The D2PAK (TO-263) footprint with the tab soldered to the PCB copper plane is the intended thermal path — the tab is the cathode common node, so it carries both current and heat.","metaTitle":"STPS40L45CG Schottky Diode, 45V 20A Dual Common Cathode","metaDescription":"STPS40L45CG Schottky rectifier: 45V reverse voltage, 20A per diode, 530mV forward drop, D2PAK. Request quote for availability.","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":"Tape & Reel (TR)","Diode Type":"Schottky","Mounting Type":"Surface Mount","Package / Case":"TO-263-3, D²Pak (2 Leads + Tab), TO-263AB","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"STPS40","Diode Configuration":"1 Pair Common Cathode","Supplier Device Package":"D2PAK","Current - Reverse Leakage @ Vr":"600 µA @ 45 V","Voltage - DC Reverse (Vr) (Max)":"45 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":"$2.0100","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/936c0427c6bf90cd9c403b0bd211edbe.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STPS40L45CG/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for STPS40L45CG?","answer":"ST has not published a direct pin-compatible successor for the STPS40L45CG in the same D2PAK common-cathode configuration. For a drop-in replacement, you would need to evaluate other 45 V, 20 A dual Schottky diodes in D2PAK from suppliers like ON Semiconductor or Vishay, verifying forward voltage and thermal performance against your design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STPS40L45CG","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STPS40L45CG 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}}