{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH1R04Q","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH1R04Q","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH1R04Q","factsUrl":"https://icboms.com/api/mcp/products/STTH1R04Q","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH1R04Q, Fast Recovery Rectifier, 400 V Vr, 1 A Io, 30 ns trr, DO-204AC (DO-15) Axial, Through Hole, 175°C Tj max.","salesMarkdown":"## 400 V, 1 A fast recovery rectifier — 30 ns trr in a DO-15 axial package The STTH1R04Q from STMicroelectronics is a 400 V, 1 A fast recovery rectifier with a 30 ns reverse recovery time, housed in a DO-204AC (DO-15) axial-lead through-hole package. It is designed for high-frequency switching applications where reverse recovery charge and switching losses must be minimised — typical roles include boost diodes in PFC stages, output rectifiers in flyback converters, and snubber clamps across switching devices. The 30 ns reverse recovery time is the key switching parameter. In a continuous-conduction-mode PFC boost stage, a 30 ns trr keeps the diode turn-off loss low enough that the heatsink stays small and the MOSFET or IGBT does not see a hard-recovery current spike at every switching cycle. The forward voltage drop is 1.5 V max at 1 A — a reasonable trade-off for the fast recovery characteristic. Reverse leakage is 5 µA at 400 V rated reverse voltage, and the junction temperature rating goes to 175°C max, so the part can sit on a hot PCB near a heatsink or transformer without derating prematurely. The DO-15 axial package is a common through-hole form factor, so cross-shopping a same-function fast recovery diode in the same footprint is straightforward.","metaTitle":"STTH1R04Q Fast Recovery Rectifier, 400 V 1 A, 30 ns trr","metaDescription":"STTH1R04Q fast recovery rectifier: 400 V reverse, 1 A forward, 30 ns trr in DO-15 axial package.","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":"Cut Tape (CT) Tape & Box (TB)","Technology":"Standard","Mounting Type":"Through Hole","Package / Case":"DO-204AC, DO-15, Axial","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"STTH1","Capacitance @ Vr, F":"-","Supplier Device Package":"DO-15 (DO-204AC)","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":"$0.6200","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/55fe0d51e64834ea5254d63702643b6e.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is STTH1R04Q obsolete?","answer":"Yes, the STTH1R04Q is marked obsolete by STMicroelectronics. There is no official successor listed."},{"question":"What is the reverse recovery time of STTH1R04Q?","answer":"The reverse recovery time (trr) is 30 ns, making it suitable for fast-switching applications like PFC boost diodes and flyback output rectifiers."},{"question":"What is the closest alternative to STTH1R04Q?","answer":"No official cross-reference or second-source part is recorded in the lifecycle data. A same-function fast recovery rectifier rated at 400 V, 1 A with a 30 ns trr in a DO-15 axial package would be the functional equivalent — confirm the forward voltage and reverse leakage match the application requirements before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH1R04Q","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH1R04Q 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}}