{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH4L06QRL","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH4L06QRL","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH4L06QRL","factsUrl":"https://icboms.com/api/mcp/products/STTH4L06QRL","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH4L06QRL, Fast Recovery Diode, Standard, 600 V, 4 A, 75 ns trr, DO-204AC (DO-15) Axial, Through Hole, Tape & Reel.","salesMarkdown":"Its 75 ns reverse recovery time keeps the turn-off loss low enough that the heatsink stays manageable at switching frequencies above 50 kHz. The 1.3 V forward drop at 3 A is a typical ultrafast figure — expect it to run warmer than a Schottky at the same current, but the 600 V blocking voltage is what lets this part sit on a 400 V DC bus with margin. STMicroelectronics lists the STTH4L06QRL as obsolete. If you have a production run that still calls out this exact suffix, the Tape & Reel variant is what the QRL designates — the base die is the same as the STTH4L06 in DO-15. For a new design or a long-run BOM, the sensible move is to qualify a current-production fast recovery diode in the same voltage and current class; the 600 V, 4 A, 75 ns trr combination is a common enough target that several manufacturers offer a direct functional equivalent in a DO-15 or SMD footprint. ## Package and mounting — through-hole axial The DO-204AC (DO-15) axial package is a through-hole form factor that suits point-to-point wiring on perforated board or traditional PCB through-hole assembly.","metaTitle":"STTH4L06QRL Fast Recovery Diode, 600 V, 4 A, 75 ns trr","metaDescription":"STTH4L06QRL is a 600 V, 4 A fast recovery rectifier with 75 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":"Tape & Reel (TR)","Diode Type":"Standard","Mounting Type":"Through Hole","Package / Case":"DO-204AC, DO-15, Axial","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"STTH4L06","Capacitance @ Vr, F":"-","Supplier Device Package":"DO-15","Reverse Recovery Time (trr)":"75 ns","Current - Reverse Leakage @ Vr":"3 µA @ 600 V","Voltage - DC Reverse (Vr) (Max)":"600 V","Current - Average Rectified (Io)":"4A","Operating Temperature - Junction":"175°C(Max)","Voltage - Forward (Vf) (Max) @ If":"1.3 V @ 3 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2318","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cd54c441a50882c750a39a649f8a34d1.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the replacement for STTH4L06QRL?","answer":"STMicroelectronics does not list a direct successor for the STTH4L06QRL. For a functional replacement, look for a current-production 600 V, 4 A fast recovery diode with a 75 ns or faster trr in a DO-15 axial package. Several manufacturers offer parts with the same voltage and current rating; the exact trr and forward voltage vary, so verify the switching loss and thermal budget against your design."},{"question":"What is the reverse recovery time of STTH4L06QRL?","answer":"The reverse recovery time (trr) is 75 ns, which classifies it as a fast recovery rectifier suitable for switching frequencies where a standard recovery diode would cause excessive loss."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH4L06QRL","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH4L06QRL 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}}