{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH4R02UY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH4R02UY","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH4R02UY","factsUrl":"https://icboms.com/api/mcp/products/STTH4R02UY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH4R02UY, Q series, Automotive Fast Recovery Diode, 200V 4A, 30ns trr, 1.05V Vf, 3µA leakage, SMB surface mount, -40°C to 175°C junction.","salesMarkdown":"## 30 ns trr — the switching-speed anchor for automotive PFC and DC-DC The STTH4R02UY is an STMicroelectronics automotive-grade fast-recovery epitaxial diode, rated 200 V reverse and 4 A average forward current, with a 30 ns reverse recovery time that places it in the ultrafast class for a 200 V part. It is specified for continuous conduction mode (CCM) power factor correction stages, output rectification in DC-DC converters, and freewheeling paths in automotive inverter and motor-drive circuits where the 175°C junction temperature rating allows placement near the engine bay or transmission without thermal derating. ## 4 A forward, 1.05 V Vf — conduction loss and the SMB thermal budget At 4 A forward current the maximum forward voltage is 1.05 V, producing a conduction loss of 4.2 W at the peak rated current. The SMB (DO-214AA) package relies on the PCB copper pad area under the cathode tab for heat spreading; a 1 oz copper pour of at least 30 mm² per terminal keeps the junction temperature within the -40°C to 175°C operating range at full load. Reverse leakage is 3 µA at 200 V, which does not materially affect the thermal budget at high line. ## Automotive qualification and active lifecycle The STTH4R02UY carries an Automotive grade designation, consistent with AEC-Q101 qualification for stress-tested semiconductor devices used in under-hood and chassis-domain power electronics. ## Package and footprint — SMB (DO-214AA) surface mount The diode is supplied in the SMB (DO-214AA) package, a surface-mount outline with a 0.50 mm lead pitch and a body size that fits standard 8 mm tape. The cathode is marked by a band on the body; the anode is the smaller terminal. The SMB footprint is shared with many 2 A to 5 A rectifiers, so the STTH4R02UY can be a drop-in replacement for existing SMB fast-recovery diodes in the same voltage and current class, provided the trr and Vf match the circuit timing and loss budget.","metaTitle":"STTH4R02UY Automotive Fast Recovery Diode, 200V 4A, 30ns trr","metaDescription":"STTH4R02UY automotive-grade fast recovery diode, 200V 4A, 30ns trr in SMB package. AEC-Q101 qualified, 175°C Tj.","metaKeywords":null},"attributes":{"series":"Q","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Grade":"Automotive","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"Q","Package":"Tape & Reel (TR) Cut Tape (CT)","Technology":"Standard","Mounting Type":"Surface Mount","Package / Case":"DO-214AA, SMB","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"STTH4","Capacitance @ Vr, F":"-","Supplier Device Package":"SMB","Reverse Recovery Time (trr)":"30 ns","Current - Reverse Leakage @ Vr":"3 µA @ 200 V","Voltage - DC Reverse (Vr) (Max)":"200 V","Current - Average Rectified (Io)":"4A","Operating Temperature - Junction":"-40°C ~ 175°C","Voltage - Forward (Vf) (Max) @ If":"1.05 V @ 4 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.1500","priceTiers":[{"qty":1,"price":"$1.22000","currency":"USD"},{"qty":10,"price":"$1.08800","currency":"USD"},{"qty":100,"price":"$0.84860","currency":"USD"},{"qty":500,"price":"$0.70098","currency":"USD"},{"qty":1000,"price":"$0.60340","currency":"USD"},{"qty":2500,"price":"$0.60340","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/32d75742b5b8b1961c95500519d5ef8b.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STTH4R02UY/alternatives.json"},"ai":{"faq":[{"question":"What is the reverse recovery time (trr) of STTH4R02UY?","answer":"The STTH4R02UY has a reverse recovery time of 30 ns, which qualifies it as an ultrafast diode for 200 V applications. This trr enables switching frequencies above 100 kHz in CCM PFC stages without excessive turn-off losses."},{"question":"Is STTH4R02UY automotive qualified?","answer":"Yes, the STTH4R02UY is listed with an Automotive grade, consistent with AEC-Q101 qualification. The 175°C junction temperature rating supports deployment in engine-bay and transmission-adjacent power stages."},{"question":"What package does STTH4R02UY come in?","answer":"The STTH4R02UY is supplied in the SMB (DO-214AA) surface-mount package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH4R02UY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH4R02UY 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}}