{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH8003CY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH8003CY","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH8003CY","factsUrl":"https://icboms.com/api/mcp/products/STTH8003CY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics Q Automotive series STTH8003CY, Fast Recovery =< 500ns, > 200mA (Io) diode, 300 V, 40 A per diode, 1 Pair Common Cathode, TO-247-3, Through Hole, Tube.","salesMarkdown":"The STTH8003CY is a 300 V, 40 A per diode fast-recovery rectifier from STMicroelectronics, configured as a common-cathode pair in a single TO-247-3 package. Its 60 ns reverse recovery time (trr) places it in the class of ultrafast diodes suited for continuous-conduction-mode PFC boost stages, output rectification in high-frequency SMPS, and motor-drive freewheeling clamps where stored charge recovery loss dominates the switching transition. ## Common-cathode pair in a TO-247 — layout and thermal fit The common-cathode configuration shares the same tab potential for both diodes, simplifying heatsink isolation in a single-sided cooling scheme. The TO-247-3 through-hole package needs a proper pad pattern for the large lead cross-section; the MAX247 supplier device package designation indicates the standard JEDEC outline. At 40 A per diode, forward voltage drops to 1.25 V at rated current, so total dissipation can reach 50 W per pair — a forced-air or large-fin heatsink is mandatory for continuous operation. The 80 µA reverse leakage at 300 V is a static loss contributor that matters at high junction temperature, where leakage roughly doubles every 10°C above 100°C. ## Obsolete — sourcing reality and cross-reference options The STTH8003CY is marked obsolete in STMicroelectronics' product status. The Q Automotive series designation suggests the original qualification target was automotive-grade applications, but the obsolete status means any replacement should also carry an AEC-Q101 or similar automotive approval if the end equipment requires it.","metaTitle":"STTH8003CY STMicroelectronics Fast Recovery Diode, 60 ns trr","metaDescription":"STTH8003CY STMicroelectronics fast recovery diode, 60 ns trr, 300 V, 40 A per diode, common cathode pair in TO-247-3. Request quote.","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":"Q Automotive","Package":"Tube","Diode Type":"Standard","Mounting Type":"Through Hole","Package / Case":"TO-247-3","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"STTH8003","Diode Configuration":"1 Pair Common Cathode","Supplier Device Package":"MAX247™","Reverse Recovery Time (trr)":"60 ns","Current - Reverse Leakage @ Vr":"80 µA @ 300 V","Voltage - DC Reverse (Vr) (Max)":"300 V","Operating Temperature - Junction":"175°C(Max)","Voltage - Forward (Vf) (Max) @ If":"1.25 V @ 40 A","Current - Average Rectified (Io) (per Diode)":"40A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10.8900","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/7702586eeb8591a93c6090760176d0d1.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is a direct replacement for STTH8003CY?","answer":"A functionally similar part would be another 300 V, 40 A ultrafast common-cathode diode in a TO-247 package, but pinout and thermal compatibility must be verified against the original footprint."},{"question":"What is the reverse recovery time of STTH8003CY?","answer":"The reverse recovery time (trr) is 60 ns, classifying it as a fast recovery diode suitable for high-frequency switching applications."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH8003CY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH8003CY 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}}