{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LR3D3406","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LR3D3406","canonicalUrl":"https://aoctrl.com/schneider/LR3D3406","factsUrl":"https://aoctrl.com/api/mcp/products/LR3D3406","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys Deca LR3D3406 non-differential thermal overload relay, 30-40 A adjustment range, Class 10A, 1 NO + 1 NC auxiliary contacts, IP20.","salesMarkdown":"It offers a thermal protection adjustment range of 30 to 40 A and is rated Class 10A per IEC 60947-4-1, meaning it will trip within 10 seconds at 7.2× the current setting — fast enough to protect standard induction motors during a locked-rotor event. The 30...40 A adjustment range covers motor FLA in that band; the relay is mounted directly under a TeSys D or TeSys Deca contactor, so the assembly fits a standard DIN-rail footprint. The Class 10A tripping class matches most general-purpose motor starting applications — pumps, fans, conveyors — where the starting time is under 10 seconds. Phase failure sensitivity triggers a trip at 130% of Ir on two phases when the third drops to zero, which is the standard requirement for preventing single-phasing damage. The 1 NO + 1 NC auxiliary contact composition gives one normally-open signal for the PLC and one normally-closed for the safety chain, a common arrangement in motor control centers. The LR3D3406 carries approvals to EN/IEC 60947-4-1, UL 60947-4-1, CSA C22.2 No 60947-4-1, and GB/T 14048.4, so it is accepted in North American, European, and Chinese installations. The IP20 degree of protection means it is touch-safe for panel installation but not rated for washdown environments. The flame retardance rating is V1 per UL 94.","metaTitle":"Schneider Electric LR3D3406 TeSys Deca thermal overload rela","metaDescription":"Schneider Electric LR3D3406 TeSys Deca thermal overload relay, 30-40 A adjustment range, Class 10A, 1 NO + 1 NC auxiliary contacts, IP20, UL/CSA/IEC rated.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Overload Relays"],"specifications":{"Depth":"4.8 in (123 mm)","Range":"TeSys","Width":"2.2 in (55 mm)","Height":"2.8 in (70 mm)","Category":"22347-CONTACTOR,D-LINE,OVERLOADS-NEW","Standards":"EN/IEC 60947-4-1 EN/IEC 60947-5-1 UL 60947-4-1 UL 60947-5-1 CSA C22.2 No 60947-4-1 CSA C22.2 No 60947-5-1 GB/T 14048.4 GB/T 14048.5","Control type":"Red push-button stop Blue push-button reset","Network type":"AC DC","Product name":"TeSys LRD TeSys Deca","lifecycle_stage":"current","Connection pitch":"0.7 in (17.5 mm)","Flame retardance":"V1 conforming to UL 94","Mounting support":"Plate, with specific accessories Rail, with specific accessories Under contactor","Device short name":"LR3D","Network Frequency":"0...400 Hz","Relay application":"Motor protection","Tightening torque":"Control circuit 15.05 lbf.in (1.7 N.m) screw clamp terminals Power circuit 53.1 lbf.in (6 N.m) lugs-ring terminals M6","Climatic withstand":"IACS E10","Tripping threshold":"1.14 +/- 0.06 Ir IEC 60947-4-1","Dielectric strength":"1.89 kV 50 Hz IEC 60947-1","Permissible current":"0.95 A 380 V AC-15 signalling circuit 0.06 A 440 V DC-13 signalling circuit","Mechanical robustness":"Shocks15 Gn for 11 ms IEC 60068-2-7 Vibrations4 gn IEC 60068-2-6","Nbr. of units in pkg.":"1","Associated fuse rating":"4 A gG for signalling circuit 4 A BS for signalling circuit","Thermal overload class":"Class 10A IEC 60947-4-1","Connections - terminals":"Control circuit screw clamp terminals 2 0.002...0.004 in² (1...2.5 mm²) flexible without cable end Control circuit screw clamp terminals 2 0.002...0.004 in² (1...2.5 mm²) flexible with cable end Control circuit screw clamp terminals 2 0.002...0.004 in² (1...2.5 mm²) solid without cable end Power circuit lugs-ring terminals","IP degree of protection":"IP20 conforming to IEC 60529","Temperature compensation":"-4...140 °F (-20...60 °C)","Phase failure sensitivity":"Tripping current 130 % of Ir on two phase, the last one at 0","Product or Component Type":"Non differential thermal overload relay","Auxiliary contact composition":"1 NO + 1 NC","[Ui] rated insulation voltage":"Power circuit 600 V CSA Power circuit 600 V UL Power circuit 690 V IEC 60947-4-1","[Ue] rated operational voltage":"690 V AC 0...400 Hz power circuit IEC 60947-4-1","Ambient Air Temperature for Storage":"-76...158 °F (-60...70 °C)","Thermal protection adjustment range":"30...40 A","Ambient air temperature for operation":"-4...140 °F (-20...60 °C) without derating IEC 60947-4-1","[Uimp] rated impulse withstand voltage":"6 kV","[Ith] conventional free air thermal current":"5 A signalling circuit"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1b928d373017a5414c2190f03a373417.pdf","sourceUrl":"https://www.se.com/ie/en/product/LR3D3406/tesys-deca-thermal-overload-relays-30-40-a-class-10a/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LR3D3406/alternatives.json"},"ai":{"faq":[{"question":"What is the closest alternative to the LR3D3406 in the TeSys family?","answer":"Within the TeSys Deca range, the LR3D3406 is a specific thermal overload relay with a 30-40 A adjustment range and Class 10A tripping class. If a different current range is needed, other LR3D models cover lower or higher bands; the mounting footprint and auxiliary contact arrangement (1 NO + 1 NC) are consistent across the series."},{"question":"What is the depth of the LR3D3406?","answer":"The depth is 4.8 in (123 mm)."},{"question":"What compliance documentation does Schneider provide for the LR3D3406?","answer":"The relay is certified to EN/IEC 60947-4-1, UL 60947-4-1, CSA C22.2 No 60947-4-1, and GB/T 14048.4. It also carries a V1 flame retardance rating per UL 94. RoHS and REACH declarations are typically available from Schneider's documentation portal."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LR3D3406","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/schneider/LR3D3406 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}