{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STPS4045CP","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STPS4045CP","canonicalUrl":"https://icboms.com/stmicroelectronics/STPS4045CP","factsUrl":"https://icboms.com/api/mcp/products/STPS4045CP","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STPS4045CP Schottky rectifier, 45 V reverse voltage, 20 A average rectified current per diode, 1 pair common cathode, through-hole TO-218-3 / SOT-93, fast recovery ≤500 ns, 175°C junction.","salesMarkdown":"## What this Schottky pair does in the circuit The STPS4045CP is a dual Schottky rectifier from STMicroelectronics, configured as a common-cathode pair in a through-hole TO-218-3 (also known as SOT-93) package. The forward voltage drop is specified at 760 mV at 20 A, which keeps conduction losses manageable in high-current rectification stages. The fast recovery characteristic (≤500 ns, >200 mA) suits switching power supplies and freewheeling diode applications where reverse-recovery charge matters. With a maximum junction temperature of 175°C, it can handle the thermal stress of industrial power converters and automotive-grade alternator or motor-drive circuits. ## 45 V reverse voltage — what it buys you The 45 V Vr(max) gives comfortable headroom on a nominal 24 V or 36 V DC bus, including transients typical in industrial power supplies and battery chargers. If your rail is 48 V or higher, you need a higher-voltage Schottky — the STPS4045CP is not the part for that. STMicroelectronics lists the STPS4045CP as obsolete. The part must be sourced through independent distribution or surplus channels. ## Mounting and thermal notes The through-hole TO-218-3 package with a metal tab is meant for bolting to a heatsink. The 175°C junction rating only holds with proper thermal management — the tab carries the heat, so a thermal pad or grease and a mechanical fix are assumed in the design. MSL is not stated, but a through-hole part of this era typically ships dry; still, if the tube has been open, a short bake before reflow is cheap insurance against moisture-related damage during soldering.","metaTitle":"STPS4045CP Schottky Diode, 45V 20A Common Cathode, TO-218","metaDescription":"STPS4045CP Schottky rectifier: 45V Vr, 20A per diode, common cathode, 760mV Vf at 20A, 175°C Tj.","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-218-3","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"STPS404","Diode Configuration":"1 Pair Common Cathode","Supplier Device Package":"SOT-93","Current - Reverse Leakage @ Vr":"200 µA @ 45 V","Voltage - DC Reverse (Vr) (Max)":"45 V","Operating Temperature - Junction":"175°C (Max)","Voltage - Forward (Vf) (Max) @ If":"760 mV @ 20 A","Current - Average Rectified (Io) (per Diode)":"20A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.6300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/afead13ea06f172428641a37c6710a9a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STPS4045CP/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STPS4045CP","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STPS4045CP 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}}