{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STPS40L15CT","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STPS40L15CT","canonicalUrl":"https://icboms.com/stmicroelectronics/STPS40L15CT","factsUrl":"https://icboms.com/api/mcp/products/STPS40L15CT","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STPS40L15CT, Schottky diode array, 1 pair common cathode, 15 V Vr, 20 A per diode, 410 mV Vf, Fast Recovery ≤ 500 ns, TO-220-3, through hole, ROHS3 compliant.","salesMarkdown":"## Low-voltage Schottky pair for high-current rectification The STPS40L15CT is a dual Schottky rectifier from STMicroelectronics, configured as a common-cathode pair in a TO-220 through-hole package. The 15 V reverse voltage rating (Vr max) limits this part to low-voltage rails — think 12 V or lower outputs in switch-mode power supplies, OR-ing diodes in redundant power systems, or secondary-side rectification in telecom bricks. The fast recovery characteristic (≤ 500 ns at > 200 mA) is typical for Schottky diodes and supports switching frequencies into the tens of kilohertz without significant reverse-recovery losses. ## 15 V Vr, 20 A per diode — where the ratings matter The 15 V reverse voltage is the hard ceiling — never apply more than 15 V reverse bias, even transiently. In a 12 V rail, that leaves only 3 V of headroom, so any ringing or overshoot on the secondary side risks avalanche. For a 5 V output, the margin is comfortable. The 410 mV Vf at 19 A means conduction losses are roughly 7.8 W per diode at full current — thermal management is the limiting factor, not the silicon. Reverse leakage is 6 mA at 15 V — typical for a low-Vf Schottky. That leakage doubles with temperature, so at high junction temps the leakage power adds to the thermal budget. The closest functional alternative within the same family is the STPS40L15CG, which differs in package (D²PAK vs TO-220).","metaTitle":"STPS40L15CT Schottky Diode 15V 20A TO-220, Obsolete","metaDescription":"STPS40L15CT dual common-cathode Schottky rectifier, 15 V Vr, 20 A per diode, 410 mV Vf.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","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-220-3","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"STPS40","Diode Configuration":"1 Pair Common Cathode","Supplier Device Package":"TO-220","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":"$2.5000","priceTiers":[{"qty":1,"price":"$2.52000","currency":"USD"},{"qty":10,"price":"$2.26800","currency":"USD"},{"qty":100,"price":"$1.82280","currency":"USD"},{"qty":500,"price":"$1.49762","currency":"USD"},{"qty":1000,"price":"$1.39965","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/ac64b71b7859706d7ef3f91d099092cc.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STPS40L15CT/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for STPS40L15CT?","answer":"ST does not list an official successor. The STPS40L15CG uses the same die in a D²PAK surface-mount package — same 15 V / 20 A ratings, but the footprint is different. For a through-hole replacement, a cross-reference search against other 15 V, 20 A common-cathode Schottky pairs in TO-220 is needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STPS40L15CT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STPS40L15CT 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}}