{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH1R04AY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH1R04AY","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH1R04AY","factsUrl":"https://icboms.com/api/mcp/products/STTH1R04AY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH1R04AY, Automotive AEC-Q101, Fast Recovery Diode, 400 V, 1 A, 30 ns trr, 1.6 Vf @ 1 A, 5 µA @ 400 V leakage, -40°C to 175°C junction, DO-214AC (SMA), Surface Mount.","salesMarkdown":"## Automotive fast-recovery rectifier for 400 V rails The STTH1R04AY is an automotive-grade (AEC-Q101) 400 V, 1 A fast-recovery rectifier from STMicroelectronics, in a DO-214AC (SMA) surface-mount package. Its 30 ns reverse recovery time and 175°C maximum junction temperature suit it for switching power supplies, DC-DC converters, and snubber circuits in under-hood automotive electronics. A 30 ns reverse recovery time at 400 V, 1 A keeps switching losses low in hard-switched topologies like boost PFC stages and flyback converters. The fast recovery reduces the reverse-recovery charge that the MOSFET or IGBT must absorb, which directly lowers the device junction temperature and improves efficiency. Forward voltage is specified at 1.6 V maximum at 1 A, giving a conduction loss floor of 1.6 W at full rated current. Reverse leakage is 5 µA at 400 V, which rises with junction temperature — at 175°C the leakage contribution to the thermal budget becomes significant and should be factored into the heatsink design. ## 175°C junction — under-hood thermal margin The 175°C Tj max provides derating headroom for high-frequency switching applications where self-heating adds to the ambient.","metaTitle":"STTH1R04AY Diode, 400V 1A Fast Recovery, AEC-Q101, SMA","metaDescription":"STTH1R04AY automotive-grade 400V 1A fast recovery diode, 30 ns trr, AEC-Q101 qualified, -40°C to 175°C junction. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":"Automotive, AEC-Q101","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Grade":"Automotive","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"-","Package":"Tape & Reel (TR) Cut Tape (CT)","Technology":"Standard","Mounting Type":"Surface Mount","Qualification":"AEC-Q101","Package / Case":"DO-214AC, SMA","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"STTH1","Capacitance @ Vr, F":"-","Supplier Device Package":"SMA","Reverse Recovery Time (trr)":"30 ns","Current - Reverse Leakage @ Vr":"5 µA @ 400 V","Voltage - DC Reverse (Vr) (Max)":"400 V","Current - Average Rectified (Io)":"1A","Operating Temperature - Junction":"-40°C ~ 175°C","Voltage - Forward (Vf) (Max) @ If":"1.6 V @ 1 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6600","priceTiers":[{"qty":1,"price":"$0.70000","currency":"USD"},{"qty":10,"price":"$0.59900","currency":"USD"},{"qty":100,"price":"$0.44700","currency":"USD"},{"qty":500,"price":"$0.35122","currency":"USD"},{"qty":1000,"price":"$0.27139","currency":"USD"},{"qty":2000,"price":"$0.26110","currency":"USD"},{"qty":5000,"price":"$0.26110","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/29ac83a9a530725517a2a43ec932c318.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STTH1R04AY/alternatives.json"},"ai":{"faq":[{"question":"Is STTH1R04AY AEC-Q101 qualified?","answer":"Yes, the STTH1R04AY is AEC-Q101 qualified, making it suitable for automotive applications that require device-level reliability testing per the AEC-Q101 stress qualification standard."},{"question":"Can STTH1R04AY replace STTH1R04?","answer":"The STTH1R04AY is the automotive-grade variant of the commercial STTH1R04. It shares the same 400 V, 1 A, 30 ns trr ratings and DO-214AC (SMA) package, so it is a direct functional and footprint replacement. The key difference is the AEC-Q101 qualification and the extended -40°C to 175°C junction temperature range of the AY version."},{"question":"Is STTH1R04AY suitable for automotive use?","answer":"It is designed for use in automotive electronics such as DC-DC converters, PFC stages, and snubber circuits under the hood."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH1R04AY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH1R04AY when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}