{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH30R04PI","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH30R04PI","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH30R04PI","factsUrl":"https://icboms.com/api/mcp/products/STTH30R04PI","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH30R04PI, Fast Recovery Diode, 30 A, 400 V, 100 ns trr, 1.45 Vf, Through Hole, DOP3I-2 Insulated (Straight Leads), Tube.","salesMarkdown":"## 100 ns trr — fast enough for hard-switching PFC and SMPS The STTH30R04PI is a 30 A, 400 V fast-recovery epitaxial diode from STMicroelectronics, built with planar technology for low leakage. Its 100 ns reverse recovery time (trr) places it squarely in the class used for continuous-current-mode (CCM) power-factor-correction boost stages and output rectification in 400 V bus converters. The 1.45 V forward drop at 30 A is typical for a 400 V-class fast diode — expect about 43 W conduction loss at full rated current, so the TO-247-like DOP3I package with its insulated tab needs a good heatsink or forced air above 15 A average. ## 175°C junction — built for the hot end of the board Rated operating junction temperature from -40°C to 175°C, which is the extended range you see in industrial power supplies, motor drives, and welding inverters — not the 150°C ceiling of commodity fast diodes. That extra 25°C headroom matters when the heatsink is shared with a bridge rectifier or IGBT. Reverse leakage at 400 V is 15 µA at 25°C; it climbs with temperature, but the planar junction keeps it under control well past 125°C. ## Obsolete — but the DOP3I footprint still has options ST lists the STTH30R04PI as Obsolete. No official successor part number appears in the lifecycle record. The DOP3I (also called TO-247AD with insulated tab) is a standard high-power through-hole package, so a parametric replacement from another 30 A, 400 V fast-recovery family with similar trr and the same footprint is the practical path. No last-time-buy window remains; stock is what the surplus channel holds.","metaTitle":"STTH30R04PI 30A 400V Fast Recovery Diode, 100 ns trr, DOP3I","metaDescription":"STMicroelectronics STTH30R04PI fast recovery diode, 30 A average, 400 V reverse, 100 ns trr.","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":"Tube","Technology":"Standard","Mounting Type":"Through Hole","Package / Case":"DOP3I-2 Insulated (Straight Leads)","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"STTH30","Capacitance @ Vr, F":"-","Supplier Device Package":"DOP3I","Reverse Recovery Time (trr)":"100 ns","Current - Reverse Leakage @ Vr":"15 µA @ 400 V","Voltage - DC Reverse (Vr) (Max)":"400 V","Current - Average Rectified (Io)":"30A","Operating Temperature - Junction":"-40°C ~ 175°C","Voltage - Forward (Vf) (Max) @ If":"1.45 V @ 30 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.0400","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1e173fd2567065fd4e14f60892a9f99a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is STTH30R04PI obsolete and what is the replacement?","answer":"Yes, ST lists the STTH30R04PI as Obsolete. No official replacement part number is published. A functional replacement requires a 30 A, 400 V fast-recovery diode with 100 ns or faster trr in the DOP3I (TO-247AD insulated) package — several manufacturers offer candidates in that footprint, but pin-for-pin compatibility must be verified against the original PCB layout."},{"question":"What is STTH30R04PI's reverse recovery time?","answer":"The STTH30R04PI has a reverse recovery time (trr) of 100 ns, which qualifies it as a fast-recovery diode (≤500 ns at >200 mA). This trr suits hard-switched PFC and output rectification in 400 V bus converters where switching losses dominate."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH30R04PI","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH30R04PI 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}}