{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STPS30L40CW","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STPS30L40CW","canonicalUrl":"https://icboms.com/stmicroelectronics/STPS30L40CW","factsUrl":"https://icboms.com/api/mcp/products/STPS30L40CW","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STPS30L40CW, dual Schottky rectifier, common-cathode configuration, 40 V Vr, 15 A per diode, 550 mV Vf at 15 A, Fast Recovery ≤ 500 ns, TO-247-3 through-hole package.","salesMarkdown":"The STPS30L40CW is a dual Schottky rectifier from STMicroelectronics, with two diodes in a common-cathode configuration inside a single TO-247-3 through-hole package. Each diode is rated for 15 A average rectified current and a maximum reverse voltage of 40 V, with a forward voltage drop of 550 mV at 15 A — the conduction loss at full load is about 8.25 W per diode, so the total heat to manage is roughly 16.5 W if both diodes are conducting at rated current. The fast-recovery characteristic (≤ 500 ns, > 200 mA) makes it suitable for switching power supplies and output rectification where Schottky's low Vf and fast turn-off reduce losses compared to a standard pn-junction diode. ## Obsolete — plan your BOM move now The STPS30L40CW is listed as obsolete. Any new design should not specify this part; existing BOM lines need a qualified replacement or a last-time-buy inventory bridge. The closest functional alternative is the STPS30L40C (without the 'W' suffix), which shares the same base product number and common-cathode TO-247-3 package — but the 'W' suffix may indicate a specific lead-free or packaging variant, so verify pin compatibility and electrical ratings before substituting. ## Package and thermal reality — TO-247-3 through-hole The common-cathode configuration means the two cathodes are internally tied to the tab, so the tab is live at the cathode potential — electrical isolation from the heatsink is required unless the system ground matches the cathode voltage. With 360 µA reverse leakage at 40 V, leakage-induced heating is negligible at room temperature but rises with junction temperature — budget for it in high-temperature environments.","metaTitle":"STPS30L40CW Schottky Diode, 40V 30A Common Cathode, TO-247-3","metaDescription":"STPS30L40CW dual Schottky rectifier: 40V Vr, 15A per diode, 550mV Vf at 15A, 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":"STPS30L40","Diode Configuration":"1 Pair Common Cathode","Supplier Device Package":"TO-247-3","Current - Reverse Leakage @ Vr":"360 µA @ 40 V","Voltage - DC Reverse (Vr) (Max)":"40 V","Operating Temperature - Junction":"150°C (Max)","Voltage - Forward (Vf) (Max) @ If":"550 mV @ 15 A","Current - Average Rectified (Io) (per Diode)":"15A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.4000","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d460c713aad4be18d143992a3bfd5681.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STPS30L40CW/alternatives.json"},"ai":{"faq":[{"question":"Is STPS30L40CW obsolete?","answer":"Yes, the STPS30L40CW is listed as obsolete. STMicroelectronics no longer manufactures it, so new designs should avoid it and existing BOMs should plan for a replacement or last-time-buy inventory."},{"question":"What are the specifications of STPS30L40CW?","answer":"It is a dual Schottky rectifier in a common-cathode configuration, rated for 40 V reverse voltage, 15 A average rectified current per diode, 550 mV forward voltage drop at 15 A, 360 µA reverse leakage at 40 V, fast recovery ≤ 500 ns, and a maximum junction temperature of 150 °C. It comes in a TO-247-3 through-hole package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STPS30L40CW","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STPS30L40CW 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}}