{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH1R04RL","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH1R04RL","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH1R04RL","factsUrl":"https://icboms.com/api/mcp/products/STTH1R04RL","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH1R04RL, Fast Recovery Rectifier, 400 V, 1 A, 30 ns trr, DO-41 Axial, Through Hole, 175°C Junction.","salesMarkdown":"## 400 V, 1 A fast recovery — what the 30 ns trr buys you The STTH1R04RL is a 400 V, 1 A fast recovery rectifier from STMicroelectronics in a DO-41 axial package. The 1.5 V forward drop at 1 A is typical for a 400 V fast-recovery part — expect about 1.5 W conduction loss at full rated current, which the DO-41 body can handle with reasonable lead-length derating. ST lists the STTH1R04RL as obsolete. No last-time-buy window or official successor part number appears on the record. If you have this on a legacy BOM, you are looking at the surplus and broker channel for remaining stock. The DO-41 package and 400 V / 1 A / 30 ns trr parametric set is common enough that several manufacturers offer functionally equivalent fast-recovery diodes — but there is no pin-compatible second source certified by ST. Each replacement needs a board-level qualification, especially for the trr and forward voltage match. ## Where you would have used it This diode was designed for continuous-current mode (CCM) power factor correction boost stages, flyback snubbers, and output rectification in off-line switch-mode power supplies up to about 75 W. The 400 V reverse voltage covers rectified 240 VAC mains with margin. The through-hole DO-41 package is a through-hole legacy form factor — the scorch mark on a dead PSU board often traces to a shorted output rectifier, and this part would have been the original fit.","metaTitle":"ST STTH1R04RL Fast Recovery Rectifier, 400V 1A 30ns DO-41","metaDescription":"STMicroelectronics STTH1R04RL 400V 1A fast recovery rectifier, 30ns trr, DO-41 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":"Tape & Reel (TR) Cut Tape (CT)","Technology":"Standard","Mounting Type":"Through Hole","Package / Case":"DO-204AL, DO-41, Axial","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"STTH1","Capacitance @ Vr, F":"-","Supplier Device Package":"DO-41","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":"$1.1500","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/55fe0d51e64834ea5254d63702643b6e.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the replacement for STTH1R04RL?","answer":"No official successor part number from ST is listed. Because the STTH1R04RL is a standard 400 V, 1 A, 30 ns trr fast recovery diode in a DO-41 package, functionally equivalent parts exist from other manufacturers — but none is a certified drop-in replacement. Any substitution requires verifying the trr, forward voltage, and reverse leakage at your operating point before committing the BOM."},{"question":"What are the specifications of STTH1R04RL?","answer":"The STTH1R04RL is a 400 V, 1 A fast recovery rectifier with a 30 ns reverse recovery time. Forward voltage is 1.5 V max at 1 A. Reverse leakage is 5 µA at 400 V. Junction temperature rating is 175°C max. The package is DO-41 axial, through-hole mount."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH1R04RL","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH1R04RL 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}}