{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH512D","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH512D","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH512D","factsUrl":"https://icboms.com/api/mcp/products/STTH512D","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH512D, Fast Recovery Diode, 1200 V, 5 A, 95 ns trr, TO-220AC package, Through Hole, Active lifecycle.","salesMarkdown":"## 1200 V, 5 A, 95 ns trr — PFC and boost diode The STTH512D is a 1200 V, 5 A fast-recovery epitaxial diode from STMicroelectronics, housed in a TO-220AC through-hole package. Its 95 ns reverse recovery time makes it a fit for hard-switching topologies like power-factor correction (PFC) boost stages, output rectification in flyback converters, and snubber clamping in motor drives. ## 95 ns trr — switching loss in hard-switched rails In a continuous-conduction-mode PFC boost at 100 kHz, a slower diode would increase the turn-on loss in the MOSFET and raise the junction temperature of both devices. This part keeps the recovery charge low enough that the designer can stay with a standard gate-drive layout without extra snubber components. Forward voltage is specified at 2.2 V maximum at 5 A, 25 °C junction. That conduction loss — about 11 W at full rated current — means the TO-220AC tab needs a heatsink sized for the duty cycle and ambient. The junction temperature ceiling is 175 °C, so the thermal budget is generous for a 5 A average load in a 50 °C ambient with a modest extruded heatsink. The base product number is STTH512, covering multiple package variants. The D suffix designates the TO-220AC through-hole version. No official second-source cross-reference appears in the record, but the parametric class — 1200 V, 5 A, fast recovery — is broadly populated across vendors. If dual-sourcing is required, the buyer can qualify an alternate from the same voltage and current class.","metaTitle":"STTH512D Fast Recovery Diode, 1200 V, 5 A, 95 ns trr","metaDescription":"STTH512D fast recovery diode from STMicroelectronics. 1200 V, 5 A, 95 ns trr, TO-220AC package. Active lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"-","Package":"Tube","Diode Type":"Standard","Mounting Type":"Through Hole","Package / Case":"TO-220-2","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"STTH512","Capacitance @ Vr, F":"-","Supplier Device Package":"TO-220AC","Reverse Recovery Time (trr)":"95 ns","Current - Reverse Leakage @ Vr":"5 µA @ 1200 V","Voltage - DC Reverse (Vr) (Max)":"1200 V","Current - Average Rectified (Io)":"5A","Operating Temperature - Junction":"175°C(Max)","Voltage - Forward (Vf) (Max) @ If":"2.2 V @ 5 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.9300","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/450f345a116f558da931cf7958ded4e9.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the STTH512D reverse recovery time?","answer":"The reverse recovery time (trr) is 95 ns, measured at standard test conditions for a fast-recovery diode."},{"question":"What package does the STTH512D come in?","answer":"The STTH512D is supplied in a TO-220AC through-hole package (TO-220-2). It ships in tube packaging."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH512D","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH512D when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}