{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH3R04Q","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH3R04Q","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH3R04Q","factsUrl":"https://icboms.com/api/mcp/products/STTH3R04Q","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH3R04Q fast recovery rectifier diode, 400 V reverse voltage, 3 A average rectified current, 35 ns reverse recovery time, DO-204AC (DO-15) axial package, through-hole mount, junction temperature 175°C max.","salesMarkdown":"## Obsolete — sourcing the STTH3R04Q for your BOM The STTH3R04Q is listed as obsolete. That means STMicroelectronics has ended production; no further factory orders or last-time-buy windows remain. A 35 ns trr places this diode in the fast-recovery class, suited for high-frequency switching in power supplies, PFC stages, and snubber circuits where a standard-recovery rectifier would cause excessive switching loss or ringing. The 400 V reverse voltage and 3 A average forward current cover common boost and flyback secondary-side rectification in the 50–150 W range. The 1.5 V forward drop at 3 A is typical for a fast-recovery device at this voltage class; expect higher conduction loss than an ultrafast or SiC Schottky, but the 35 ns recovery keeps the switching node clean. ## DO-15 axial package — board-level fit The STTH3R04Q comes in a DO-204AC (DO-15) axial-lead package, through-hole mount. This is a common 5 mm diameter, 7.6 mm body-length package with 0.81 mm diameter leads — a standard footprint for PTH rectifiers. The Tape & Box (TB) shipping format is typical for axial diodes; it feeds well into cut-tape or ammo-pack handling for hand-insertion or selective-solder processes. No MSL rating applies to hermetic axial diodes — no bake required before reflow, but the part is wave-solder or hand-solder only. ## Junction temperature rating Rated for a maximum junction temperature of 175 °C, which is the standard high-temperature limit for silicon fast-recovery diodes. This allows operation in elevated ambient environments such as enclosed power supplies, motor drives, or lighting ballasts where internal temperatures can exceed 100 °C. The 5 µA reverse leakage at 400 V is specified at 25 °C; leakage doubles roughly every 10 °C rise, so at 125 °C junction expect leakage in the tens of microamps — still manageable for most designs.","metaTitle":"STTH3R04Q Fast Recovery Diode, 400V 3A, 35ns trr, DO-15","metaDescription":"STTH3R04Q fast recovery rectifier: 400V, 3A, 35ns trr, DO-15 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":"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":"STTH3R","Capacitance @ Vr, F":"-","Supplier Device Package":"DO-15","Reverse Recovery Time (trr)":"35 ns","Current - Reverse Leakage @ Vr":"5 µA @ 400 V","Voltage - DC Reverse (Vr) (Max)":"400 V","Current - Average Rectified (Io)":"3A","Operating Temperature - Junction":"175°C (Max)","Voltage - Forward (Vf) (Max) @ If":"1.5 V @ 3 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6200","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b3471ccdfc6412c132f7c671cc95fd59.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is STTH3R04Q obsolete?","answer":"Yes, the STTH3R04Q is listed as obsolete. STMicroelectronics has ended production, and no factory last-time-buy is available."},{"question":"What is the replacement for STTH3R04Q?","answer":"The evidence does not list an official STMicroelectronics successor order code for the STTH3R04Q. For a pin-compatible replacement, look at the STTH3R04 series in the same DO-15 package — the STTH3R04 is the base part without the 'Q' suffix, which may still be active. Confirm fit by comparing the forward voltage, reverse recovery time, and current rating against your design requirements."},{"question":"What is the reverse recovery time of STTH3R04Q?","answer":"The reverse recovery time (trr) is 35 ns, making it a fast-recovery diode suitable for high-frequency switching applications."},{"question":"What package is STTH3R04Q?","answer":"The STTH3R04Q is supplied in a DO-204AC (DO-15) axial-lead package, through-hole mount. The shipping format is Tape & Box (TB)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH3R04Q","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH3R04Q 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}}