{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH4L06Q","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH4L06Q","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH4L06Q","factsUrl":"https://icboms.com/api/mcp/products/STTH4L06Q","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH4L06Q, Fast Recovery =< 500ns > 200mA (Io), Standard Diode, 600 V, 4 A, 75 ns trr, Through Hole, DO-204AC/DO-15 Axial, 175°C Junction.","salesMarkdown":"## What the 75 ns trr means for your switching stage The STTH4L06Q is a 600 V, 4 A fast recovery diode from STMicroelectronics, housed in a DO-15 axial package. Its 75 ns reverse recovery time (trr) places it squarely in the ultrafast class — clean for hard-switched PFC boost stages, secondary-side rectification in flyback converters, and motor drive snubbers where recovery losses matter. The 1.3 V forward drop at 3 A is typical for a 600 V planar structure; the 3 µA reverse leakage at rated voltage stays low enough for most off-line supplies. Junction temperature is rated to 175°C, the standard for industrial and automotive-grade silicon. ST lists the STTH4L06Q as Obsolete. ## DO-15 axial — through-hole mounting notes The DO-204AC (DO-15) axial leaded package is a through-hole form factor. Lead forming for vertical or horizontal board mounting is standard; the body diameter and lead spacing are compatible with 0.6 mm diameter holes on a 5 mm pitch. The 4 A continuous rating assumes adequate copper pad area and airflow — derate for ambient above 25°C per the thermal resistance curve in the datasheet. No exposed pad; heat is conducted through the leads.","metaTitle":"STTH4L06Q Fast Recovery Diode, 600 V, 4 A, 75 ns trr, DO-15","metaDescription":"STTH4L06Q is an obsolete ST fast recovery diode rated 600 V, 4 A, with 75 ns trr in a 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 & Box (TB)","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":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cd54c441a50882c750a39a649f8a34d1.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STTH4L06Q/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for STTH4L06Q?","answer":"For a new design, look for an active STTH4L06-family variant with the same 600 V / 4 A / 75 ns trr ratings in a DO-15 package, or a cross-reference from another manufacturer with matching parametrics."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH4L06Q","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH4L06Q 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}}