{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STPS40SM100CG","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STPS40SM100CG","canonicalUrl":"https://icboms.com/stmicroelectronics/STPS40SM100CG","factsUrl":"https://icboms.com/api/mcp/products/STPS40SM100CG","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STPS40SM100CG, Schottky diode, 1 Pair Common Cathode, 100 V, 20 A per diode, 810 mV Vf, D2PAK, Surface Mount, Tube.","salesMarkdown":"## Dual Schottky in a D2PAK – what this part is The STPS40SM100CG is a dual Schottky rectifier from STMicroelectronics, configured as a common-cathode pair in a single D2PAK surface-mount package. Each diode is rated for 20 A average rectified current and a 100 V reverse voltage, with a forward voltage drop of 810 mV at 20 A. The fast-recovery characteristic (≤500 ns, >200 mA Io) suits it for high-frequency switching power supplies and output rectification stages where Schottky's low Vf and fast switching reduce losses. If your design is still in development, consider qualifying a current-production dual-Schottky in D2PAK from ST's STPS40 family or a pin-compatible alternative before the remaining stock dries up. ## 20 A per diode, 100 V – thermal and layout notes At 20 A per diode the forward drop hits 810 mV, which works out to about 16 W per diode in conduction loss at full rated current. The common-cathode configuration means the two anodes are separate; the shared cathode is the tab, which is usually tied to the output rail in a center-tapped rectifier or to ground in a negative-rail OR-ing circuit. Reverse leakage at 100 V is 45 µA – negligible at room temperature, but it doubles roughly every 10°C rise, so budget for it at high junction temperature.","metaTitle":"STPS40SM100CG Schottky Diode, 100V 20A Dual Common Cathode","metaDescription":"STPS40SM100CG dual Schottky rectifier: 100V Vr, 20A per diode, 810mV Vf, D2PAK. Request quote.","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":"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":"45 µA @ 100 V","Voltage - DC Reverse (Vr) (Max)":"100 V","Operating Temperature - Junction":"150°C(Max)","Voltage - Forward (Vf) (Max) @ If":"810 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/295145aada28569b4c01ba132d77235d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STPS40SM100CG/alternatives.json"},"ai":{"faq":[{"question":"Is STPS40SM100CG obsolete?","answer":"Yes, STMicroelectronics lists the STPS40SM100CG as obsolete. No direct replacement has been announced. For existing BOM lines, sourcing is through the independent market; for new designs, look at current-production dual-Schottky diodes in D2PAK from the STPS40 family or equivalent."},{"question":"What is the replacement for STPS40SM100CG?","answer":"STMicroelectronics has not published an official successor for the STPS40SM100CG. A functionally similar current-production part would need to match the 100 V, 20 A per diode, common-cathode, D2PAK footprint. Check the STPS40L60CG (lower Vf but 60 V rating) or other STPS40 variants – verify pin-compatibility and electrical margins before substitution."},{"question":"STPS40SM100CG vs STPS40L60CG – which is better?","answer":"The STPS40L60CG is a 60 V device versus the SM100CG's 100 V rating. If your rail voltage is under 60 V, the L60CG's lower forward drop (typically 620 mV at 20 A vs 810 mV) reduces conduction loss. But for a 100 V bus, the SM100CG is the only one that fits the voltage rating. Both are common-cathode dual diodes in D2PAK, so they are footprint-compatible. The SM100CG is obsolete; the L60CG may still be active – check current lifecycle status."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STPS40SM100CG","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STPS40SM100CG 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}}