{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH1512D","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH1512D","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH1512D","factsUrl":"https://icboms.com/api/mcp/products/STTH1512D","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH1512D, Fast Recovery Diode, Standard, 1200 V, 15 A, 105 ns trr, Through Hole, TO-220-2, Tube.","salesMarkdown":"The STTH1512D is a 1200 V, 15 A fast-recovery rectifier from STMicroelectronics, built for hard-switched topologies where reverse recovery time drives turn-off loss. Its 105 ns trr at 15 A keeps the switching node clean in continuous-conduction-mode PFC stages and high-voltage flyback converters. The 2.1 V forward drop at rated current is a trade-off for the speed — expect higher conduction loss than a standard 1200 V diode, but the recovery charge saved at high frequency more than compensates in most designs. ST lists the STTH1512D as obsolete. ## Package and mounting — TO-220AC through-hole The STTH1512D comes in a TO-220-2 package (supplier device package TO-220AC), through-hole mount, shipped in tube. The junction is rated to 175 °C maximum, so the tab must be heatsunk in any continuous-current application near the 15 A rating. Off-state leakage is 15 µA at 1200 V — negligible at room temperature, but doubles roughly every 10 °C above 25 °C junction.","metaTitle":"STMicroelectronics STTH1512D Fast Recovery Diode, 1200 V","metaDescription":"STTH1512D fast recovery diode, 1200 V, 15 A, 105 ns trr, TO-220AC.","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","Diode Type":"Standard","Mounting Type":"Through Hole","Package / Case":"TO-220-2","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"STTH1512","Capacitance @ Vr, F":"-","Supplier Device Package":"TO-220AC","Reverse Recovery Time (trr)":"105 ns","Current - Reverse Leakage @ Vr":"15 µA @ 1200 V","Voltage - DC Reverse (Vr) (Max)":"1200 V","Current - Average Rectified (Io)":"15A","Operating Temperature - Junction":"175°C(Max)","Voltage - Forward (Vf) (Max) @ If":"2.1 V @ 15 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1c9e873a4e85bc65f18cc5267afc2777.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STTH1512D/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for STTH1512D?","answer":"ST has not published an official replacement order code for the STTH1512D. For a pin-compatible alternative in the same TO-220AC package with 1200 V / 15 A rating and similar trr, evaluate the STTH15R12D or a comparable fast-recovery diode from another manufacturer. Confirm the forward voltage and recovery time against your switching frequency before requalifying."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH1512D","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH1512D 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}}