{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH512B","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH512B","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH512B","factsUrl":"https://icboms.com/api/mcp/products/STTH512B","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH512B, Fast Recovery =< 500ns, > 200mA (Io), Standard Diode Type, Surface Mount, TO-252-3 / DPAK, 1200 V, 5 A, 95 ns trr.","salesMarkdown":"## 1200 V / 5 A fast recovery diode — the snubber and PFC choice The STTH512B is a 1200 V, 5 A fast recovery rectifier from STMicroelectronics in a DPAK (TO-252-3) surface-mount package. Its 95 ns reverse recovery time (trr) makes it suitable for continuous-conduction-mode PFC boost stages, flyback snubbers, and output rectification in 1–2 kW switch-mode power supplies where reverse-recovery losses dominate the switching loss budget. Reverse leakage is 5 µA at 1200 V, a low figure that helps standby efficiency in off-line supplies. STMicroelectronics lists the STTH512B as obsolete. For new designs, a same-function 1200 V, 5 A fast recovery diode in DPAK from ST's current portfolio (e.g., the STTH5L12 series) or from competitors (Vishay, ON Semiconductor) should be evaluated. A 95 ns trr at 5 A forward current and 1200 V blocking means the diode recovers quickly enough for switching frequencies up to about 100 kHz in hard-switched topologies before reverse-recovery losses become the dominant loss mechanism. In a 100 kHz PFC boost, the recovery charge (Qrr) will be roughly 0.5 µC, which the MOSFET must absorb each cycle — a figure that keeps the switching node ringing within acceptable bounds with a properly damped snubber.","metaTitle":"STTH512B Fast Recovery Diode, 1200 V 5 A, 95 ns trr, DPAK","metaDescription":"STTH512B 1200 V 5 A fast recovery diode in DPAK. 95 ns trr. Specifications and procurement details.","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":"Surface Mount","Package / Case":"TO-252-3, DPak (2 Leads + Tab), SC-63","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"STTH512","Capacitance @ Vr, F":"-","Supplier Device Package":"DPAK","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":"$4.1300","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/450f345a116f558da931cf7958ded4e9.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the reverse recovery time of STTH512B?","answer":"The STTH512B has a reverse recovery time (trr) of 95 ns."},{"question":"Is STTH512B obsolete and what is the replacement?","answer":"Yes, the STTH512B is obsolete per STMicroelectronics. No official replacement order code is listed. For new designs, evaluate a current 1200 V, 5 A fast recovery diode in DPAK from ST's STTH5L12 family or from Vishay/ON Semiconductor."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH512B","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH512B 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}}