{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH1R04QRL","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH1R04QRL","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH1R04QRL","factsUrl":"https://icboms.com/api/mcp/products/STTH1R04QRL","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH1R04QRL, Fast Recovery Diode, Standard, 400 V, 1 A, 30 ns trr, DO-204AC (DO-15) Axial, Through Hole.","salesMarkdown":"The STTH1R04QRL is a 400 V, 1 A fast-recovery rectifier from STMicroelectronics, built for the high-frequency side of offline power supplies. The 1.5 V forward drop at 1 A is typical for a 400 V-class fast diode — the trade-off for the speed is a slightly higher Vf than a standard recovery part, but the recovery charge saved at 50–100 kHz more than compensates in efficiency. ## 175°C junction — thermal headroom for dense layouts Rated for a maximum junction temperature of 175°C, the STTH1R04QRL gives thermal margin in designs where the diode shares a cramped heatsink or sits near a hot MOSFET. The 5 µA reverse leakage at 400 V is specified at 25°C; expect that to multiply with temperature, so the leakage power contribution should be checked against the thermal model at the full 175°C limit. The DO-15 axial package is a through-hole format that suits point-to-point wiring on heatsink tabs or terminal blocks in industrial power modules. STMicroelectronics lists the STTH1R04QRL as Active. The base product number STTH1 covers a family of 1 A fast-recovery diodes with voltage options from 200 V to 600 V; the R04 suffix in this variant specifies the 400 V rating.","metaTitle":"STTH1R04QRL Fast Recovery Diode, 400V 1A, 30ns trr, DO-15","metaDescription":"STTH1R04QRL is a 400V 1A fast recovery rectifier with 30ns trr in DO-15 axial package. Active lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Diode Type":"Standard","Mounting Type":"Through Hole","Package / Case":"DO-204AC, DO-15, Axial","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"STTH1","Capacitance @ Vr, F":"-","Supplier Device Package":"DO-15","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":"175°C(Max)","Voltage - Forward (Vf) (Max) @ If":"1.5 V @ 1 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2117","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/55fe0d51e64834ea5254d63702643b6e.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the reverse recovery time of STTH1R04QRL?","answer":"The reverse recovery time (trr) is 30 ns, making it suitable for high-frequency switching applications like PFC and flyback converters."},{"question":"Is STTH1R04QRL RoHS compliant?","answer":"The STTH1R04QRL is listed with a standard diode type and through-hole mounting; STMicroelectronics typically marks RoHS compliance on the product label and datasheet. Verify the specific date code against the latest ST RoHS declaration for your region."},{"question":"What is the closest pin-compatible alternative to STTH1R04QRL in this component family?","answer":"Within the STTH1R04 family, the STTH1R04U (SMB surface-mount) and STTH1R04RL (DO-15 axial, bulk) share the same 400 V / 1 A / 30 ns die. The QRL suffix specifically indicates Tape & Reel packaging for the DO-15 axial. For a through-hole drop-in, the STTH1R04RL (bulk tube) is the same part without the reel."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH1R04QRL","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH1R04QRL 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}}