{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH112RL","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH112RL","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH112RL","factsUrl":"https://icboms.com/api/mcp/products/STTH112RL","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH112RL, Fast Recovery Diode, 1200 V, 1 A, 75 ns trr, DO-41 axial, Through Hole, ROHS3 compliant.","salesMarkdown":"## 75 ns reverse recovery — what it buys the switching stage The STTH112RL is a 1200 V, 1 A fast-recovery rectifier from STMicroelectronics, built with planar technology to deliver a 75 ns typical reverse recovery time. That trr figure puts it squarely in the continuous-current PFC boost diode class — fast enough to minimise turn-off losses in a 50–100 kHz hard-switched converter without the snap-off characteristic of an ultrafast diode. ## 1200 V blocking — derating headroom for 400 VDC rails With a 1200 V DC reverse voltage rating and a 1.9 V forward drop at 1 A, this diode is sized for the boost stage of a single-phase PFC front end where the bulk rail sits at 400 VDC. The 1200 V rating gives a 3× derating margin against the nominal rail, which covers the ringing overshoot from the boost inductor and the MOSFET drain node during turn-off transients. ## DO-41 axial — mounting and thermal note The DO-204AL (DO-41) axial-lead package is a through-hole form factor that has been a workhorse for PFC boost diodes and output rectifiers in open-frame power supplies for decades. The junction temperature ceiling is 175 °C, so the thermal design is limited by the lead-to-ambient path — a 0.5-inch lead length to the PCB copper plane is the practical heatsink. The tape-and-reel variant (STTH112RL) is the production-friendly option for auto-insertion; the cut-tape option suits prototype or low-volume builds.","metaTitle":"STTH112RL 1.2 kV 1 A Fast Recovery Diode, 75 ns trr, DO-41","metaDescription":"STTH112RL from STMicroelectronics: 1200 V, 1 A fast recovery rectifier with 75 ns trr. DO-41 axial package, active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"-","Package":"Tape & Reel (TR) Cut Tape (CT)","Technology":"Standard","Mounting Type":"Through Hole","Package / Case":"DO-204AL, DO-41, Axial","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"STTH112","Capacitance @ Vr, F":"-","Supplier Device Package":"DO-41","Reverse Recovery Time (trr)":"75 ns","Current - Reverse Leakage @ Vr":"5 µA @ 1200 V","Voltage - DC Reverse (Vr) (Max)":"1200 V","Current - Average Rectified (Io)":"1A","Operating Temperature - Junction":"175°C (Max)","Voltage - Forward (Vf) (Max) @ If":"1.9 V @ 1 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6300","priceTiers":[{"qty":1,"price":"$0.63000","currency":"USD"},{"qty":10,"price":"$0.54400","currency":"USD"},{"qty":100,"price":"$0.37660","currency":"USD"},{"qty":500,"price":"$0.31464","currency":"USD"},{"qty":1000,"price":"$0.26777","currency":"USD"},{"qty":2000,"price":"$0.23849","currency":"USD"},{"qty":5000,"price":"$0.22593","currency":"USD"},{"qty":10000,"price":"$0.20920","currency":"USD"},{"qty":25000,"price":"$0.20712","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/3db2616c4477c3dc0aa67a971591ed5a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STTH112RL/alternatives.json"},"ai":{"faq":[{"question":"What is the reverse recovery time of STTH112RL?","answer":"The STTH112RL has a typical reverse recovery time (trr) of 75 ns. This is the time it takes the diode to switch from forward conduction to reverse blocking, and it determines the turn-off switching loss in a hard-switched converter."},{"question":"STTH112RL equivalent diode cross reference?","answer":"No official cross-reference or second-source alternate is listed for the STTH112RL. For a pin-compatible alternative in the same 1200 V, 1 A fast-recovery class, a buyer would need to compare trr and Vf against parts like the BYV26E or UF4007 — but these are not direct replacements and require bench verification of switching losses and thermal performance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH112RL","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH112RL 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}}