{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH108RL","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH108RL","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH108RL","factsUrl":"https://icboms.com/api/mcp/products/STTH108RL","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH108RL, Fast Recovery Diode, Standard, 800 V, 1 A, 75 ns reverse recovery, DO-204AL (DO-41) axial, through hole, Tape & Reel.","salesMarkdown":"## 800 V, 1 A, 75 ns — a fast-recovery axial diode for PFC and snubber duty The STTH108RL is a 1 A, 800 V fast-recovery rectifier from STMicroelectronics in a DO-41 axial-lead package. Its 75 ns reverse recovery time (trr) makes it suitable for continuous-conduction-mode PFC boost stages, output rectification in flyback converters, and snubber clamping where recovery loss matters. The 800 V reverse voltage rating provides derating margin on a 400 V DC bus or 480 VAC rectified line. A 75 ns trr at 1 A forward current and 800 V blocking means this diode can switch in the 50–100 kHz range without excessive turn-off loss. In a CCM PFC stage, that recovery charge directly affects the MOSFET's turn-on loss and the EMI signature. The 1.65 V forward drop at 1 A is typical for a fast-recovery part in this voltage class — expect a few degrees of junction rise in free-air, but the 175 °C max junction rating gives headroom if you heatsink the leads or mount in forced airflow. STMicroelectronics lists the STTH108RL as obsolete. The last-time-buy window has closed, so new production is not available from the factory. Independent distribution and surplus channels remain the supply path. For a new design, consider the active STTH1R06 or STTH1L06 family members in the same DO-41 footprint — they share the 1 A rating and axial package, with 30 ns or 50 ns trr options at 600 V.","metaTitle":"STTH108RL Fast Recovery Diode, 800V 1A 75ns DO-41","metaDescription":"STTH108RL 800V 1A fast recovery diode, 75ns trr, DO-41 axial. Quoted on request.","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":"Tape & Reel (TR)","Diode Type":"Standard","Mounting Type":"Through Hole","Package / Case":"DO-204AL, DO-41, Axial","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"STTH10","Capacitance @ Vr, F":"-","Supplier Device Package":"DO-41","Reverse Recovery Time (trr)":"75 ns","Current - Reverse Leakage @ Vr":"5 µA @ 800 V","Voltage - DC Reverse (Vr) (Max)":"800 V","Current - Average Rectified (Io)":"1A","Operating Temperature - Junction":"175°C(Max)","Voltage - Forward (Vf) (Max) @ If":"1.65 V @ 1 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6600","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f18750f10a4c1a5329c268d94c1141c6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STTH108RL/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for STTH108RL?","answer":"STMicroelectronics does not list a direct pin-compatible replacement for the STTH108RL. For new designs, consider the active STTH1R06 or STTH1L06 series (600 V, 1 A, DO-41) with faster trr options. For existing BOMs, the surplus channel is the primary supply route."},{"question":"What is the reverse recovery time of STTH108RL?","answer":"The STTH108RL has a reverse recovery time (trr) of 75 ns."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH108RL","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH108RL 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}}