{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STPS640CB","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STPS640CB","canonicalUrl":"https://icboms.com/stmicroelectronics/STPS640CB","factsUrl":"https://icboms.com/api/mcp/products/STPS640CB","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STPS640CB dual Schottky rectifier, 40 V reverse voltage, 3 A average per diode, common cathode pair, 630 mV forward drop at 3 A, fast recovery ≤500 ns, DPAK surface-mount package, tube.","salesMarkdown":"## Dual Schottky in a DPAK — what this part is The STPS640CB is a dual Schottky rectifier from STMicroelectronics, pairing two 40 V, 3 A diodes in a common-cathode configuration inside a single DPAK (TO-252) surface-mount package. The common-cathode layout means both anodes are independent while the cathode tab is shared — typical for center-tapped secondary rectification or OR-ing diode arrays in low-voltage power supplies. ## Forward drop and leakage — the thermal budget drivers At 3 A forward current the maximum forward voltage is 630 mV. The reverse leakage at 40 V is 100 µA. STMicroelectronics lists the STPS640CB as obsolete. ## Package and reflow — DPAK checklist The tube shipment means parts are not pre-baked for moisture sensitivity; check the MSL level on the date-code-specific label before reflow if the parts have been stored outside a dry cabinet.","metaTitle":"STPS640CB Schottky Diode, 40V 3A Dual Common Cathode, DPAK","metaDescription":"STPS640CB dual Schottky rectifier, 40V Vr, 3A per diode, 630mV Vf at 3A. Fast recovery ≤500ns. DPAK surface mount.","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":"Surface Mount","Package / Case":"TO-252-3, DPak (2 Leads + Tab), SC-63","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"STPS64","Diode Configuration":"1 Pair Common Cathode","Supplier Device Package":"DPAK","Current - Reverse Leakage @ Vr":"100 µA @ 40 V","Voltage - DC Reverse (Vr) (Max)":"40 V","Operating Temperature - Junction":"150°C (Max)","Voltage - Forward (Vf) (Max) @ If":"630 mV @ 3 A","Current - Average Rectified (Io) (per Diode)":"3A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/0440581d7339b43da7962c03f5839e9e.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STPS640CB/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STPS640CB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STPS640CB 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}}