{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STPS40L45CW","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STPS40L45CW","canonicalUrl":"https://icboms.com/stmicroelectronics/STPS40L45CW","factsUrl":"https://icboms.com/api/mcp/products/STPS40L45CW","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STPS40L45CW, Schottky diode array, 1 pair common cathode, 45 V DC reverse, 20 A average rectified per diode, 530 mV forward voltage, fast recovery ≤ 500 ns, TO-247-3 through-hole package.","salesMarkdown":"Each diode is rated for 45 V reverse voltage and 20 A average rectified current, with a maximum forward voltage of 530 mV at 20 A — the conduction loss per diode at full load is about 10.6 W, which drives the heatsink requirement. The Fast Recovery rating (≤ 500 ns at > 200 mA) confirms this is a standard-speed Schottky, not an ultrafast or SiC device. It is suited for 50–100 kHz switch-mode power supplies, output rectification in ATX and telecom bricks, and freewheeling diodes in motor drives where the reverse voltage stays under 45 V. ## Package and thermal planning The TO-247-3 package (Supplier Device Package TO-247-3) is a through-hole, three-lead power package with a large copper tab for heatsink mounting. For a 20 A per diode load at 530 mV Vf, the total dissipation of both diodes can exceed 20 W — a forced-air or bolted heatsink is required to keep junction temperature within limits. ## Reverse leakage at temperature Reverse leakage is specified at 600 µA at 45 V. Schottky leakage doubles with every 10–15 °C rise above 25 °C, so at 125 °C junction the leakage can approach tens of milliamps, contributing to standby loss and potential thermal runaway if the heatsink is undersized.","metaTitle":"STPS40L45CW Schottky Diode Array, 45V 20A TO-247-3, Obsolete","metaDescription":"STPS40L45CW dual common-cathode Schottky rectifier, 45V, 20A per diode, 530 mV Vf, TO-247-3.","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-247-3","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"STPS40","Diode Configuration":"1 Pair Common Cathode","Supplier Device Package":"TO-247-3","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":"$2.7600","priceTiers":[{"qty":1,"price":"$2.76000","currency":"USD"},{"qty":10,"price":"$2.29300","currency":"USD"},{"qty":100,"price":"$1.82470","currency":"USD"},{"qty":500,"price":"$1.54402","currency":"USD"},{"qty":1000,"price":"$1.31007","currency":"USD"},{"qty":2000,"price":"$1.24457","currency":"USD"},{"qty":5000,"price":"$1.19778","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/936c0427c6bf90cd9c403b0bd211edbe.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STPS40L45CW/alternatives.json"},"ai":{"faq":[{"question":"What are the specifications of STPS40L45CW?","answer":"The STPS40L45CW is a dual Schottky rectifier with common-cathode configuration. Reverse leakage is 600 µA at 45 V. It is a Fast Recovery device (≤ 500 ns at > 200 mA). Package is TO-247-3 through-hole, junction temperature rated to 150 °C."},{"question":"What is the replacement for STPS40L45CW?","answer":"For an existing BOM, a functionally equivalent dual Schottky in TO-247-3 with 45 V / 20 A per diode and common-cathode configuration from another manufacturer may be cross-shopped — confirm pinout and thermal performance against the original design before substituting."},{"question":"What is STPS40L45CW's listed speed?","answer":"The STPS40L45CW is rated as Fast Recovery, with recovery time ≤ 500 ns at forward current > 200 mA. This is a standard-speed Schottky, suitable for 50–100 kHz switching applications."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STPS40L45CW","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STPS40L45CW when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T16:10:43.710Z","lastPublished":"2026-07-16T16:10:43.710Z","indexable":true}}