{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STPS40SM80CT","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STPS40SM80CT","canonicalUrl":"https://icboms.com/stmicroelectronics/STPS40SM80CT","factsUrl":"https://icboms.com/api/mcp/products/STPS40SM80CT","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STPS40SM80CT, Schottky diode, 80 V DC reverse, 20 A average rectified per diode, common-cathode pair, fast recovery ≤500 ns, TO-220-3 through-hole package.","salesMarkdown":"## Schottky pair for 80 V rail rectification The STPS40SM80CT is a dual Schottky rectifier from STMicroelectronics, pairing two 20 A diodes in a common-cathode configuration inside a single TO-220-3 through-hole package. It is rated for an 80 V maximum reverse voltage and delivers a forward voltage drop of 800 mV at 20 A per diode, with a fast recovery time of ≤500 ns above 200 mA. ## 20 A per leg — thermal budget in the TO-220 tab Each diode in the pair handles 20 A average rectified current. At that current the forward drop is 800 mV, so each leg dissipates 16 W when conducting. The TO-220 package relies on the metal tab for heatsinking — without a proper heatsink the junction temperature will climb toward the 175 °C maximum, and the reverse leakage at 80 V (50 µA typical) rises sharply with temperature. A heatsink with a thermal resistance below 3 °C/W keeps the junction within a safe operating margin in continuous duty.","metaTitle":"STPS40SM80CT Schottky Diode, 80V 20A Common Cathode, TO-220","metaDescription":"STPS40SM80CT Schottky rectifier, 80V reverse, 20A per diode, common cathode pair in TO-220.","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-220-3","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"STPS40","Diode Configuration":"1 Pair Common Cathode","Supplier Device Package":"TO-220","Current - Reverse Leakage @ Vr":"50 µA @ 80 V","Voltage - DC Reverse (Vr) (Max)":"80 V","Operating Temperature - Junction":"175°C(Max)","Voltage - Forward (Vf) (Max) @ If":"800 mV @ 20 A","Current - Average Rectified (Io) (per Diode)":"20A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.8600","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/22d3f28143d7304832147a477cb05869.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STPS40SM80CT/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STPS40SM80CT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STPS40SM80CT 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}}