{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH812G","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH812G","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH812G","factsUrl":"https://icboms.com/api/mcp/products/STTH812G","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH812G, Fast Recovery Diode, 1200 V, 8 A, 100 ns trr, 2.2 Vf @ 8 A, 8 µA leakage @ 1200 V, D2PAK, 175°C junction, Tube.","salesMarkdown":"## 1200 V, 8 A, 100 ns trr — the fast recovery diode for high-voltage switching The STMicroelectronics STTH812G is a 1200 V, 8 A fast recovery rectifier with a 100 ns reverse recovery time, housed in a D2PAK (TO-263AB) surface-mount package. It is designed for high-frequency power conversion where fast switching and low recovery losses matter — think power-factor-correction stages, output rectification in switch-mode supplies, solar inverter boost stages, and snubber circuits across 400 V bus architectures. A 100 ns reverse recovery time at 1200 V blocking is the spec that separates this diode from standard-recovery parts. In a hard-switched PFC or flyback converter, that trr directly reduces turn-on losses in the MOSFET and lowers EMI at the switching edge. The 2.2 V forward drop at 8 A is the conduction-loss number to plug into the thermal model — expect to budget copper area or a heatsink if the average current is above 4 A continuous. The 8 µA leakage at 1200 V is tight enough for high-impedance bus holding, but confirm derating above 125°C junction. Every unit sourced through that channel should be physically authenticated — the D2PAK laser etch, date-code consistency, and package marking must match ST's factory format for the week code. A decap and X-ray inspection is the only way to confirm the die matches the original ST design, especially given the 1200 V rating where a counterfeit die could fail catastrophically under surge.","metaTitle":"ST STTH812G 1200 V 8 A Fast Recovery Diode, 100 ns trr","metaDescription":"STMicroelectronics STTH812G fast recovery diode: 1200 V, 8 A, 100 ns trr in D2PAK. Specifications and sourcing info.","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":"Surface Mount","Package / Case":"TO-263-3, D²Pak (2 Leads + Tab), TO-263AB","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"STTH812","Capacitance @ Vr, F":"-","Supplier Device Package":"D2PAK","Reverse Recovery Time (trr)":"100 ns","Current - Reverse Leakage @ Vr":"8 µA @ 1200 V","Voltage - DC Reverse (Vr) (Max)":"1200 V","Current - Average Rectified (Io)":"8A","Operating Temperature - Junction":"175°C (Max)","Voltage - Forward (Vf) (Max) @ If":"2.2 V @ 8 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.0600","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/32b05db8fb0de69bb009b669ebcf2d5e.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is the STTH812G obsolete?","answer":"Yes, the STTH812G is listed as Obsolete by STMicroelectronics. No official replacement part number has been issued."},{"question":"What is the STTH812G replacement or equivalent?","answer":"No official replacement or second-source part is recorded. For a pin-compatible substitute, evaluate a 1200 V, 8 A fast recovery diode in D2PAK from another manufacturer — confirm the trr, Vf, and package footprint match your layout before committing the BOM."},{"question":"What is the reverse recovery time of the STTH812G?","answer":"The STTH812G has a reverse recovery time of 100 ns."},{"question":"What package does the STTH812G come in?","answer":"The STTH812G is supplied in a D2PAK (TO-263AB) surface-mount package, shipped in Tube format."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH812G","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH812G 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}}