{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LRD3359A66","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LRD3359A66","canonicalUrl":"https://aoctrl.com/schneider/LRD3359A66","factsUrl":"https://aoctrl.com/api/mcp/products/LRD3359A66","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys Deca differential thermal overload relay, LRD3359A66, 48–65 A adjustment, Class 10A, 1000 V AC rated insulation.","salesMarkdown":"Its thermal protection adjustment range covers 48…65 A, meaning it directly matches motors drawing full-load current in that band — no external CTs or scaling needed. Rated thermal overload class 10A per IEC 60947-4-1, so it trips within 10 seconds at 7.2× Ir — fast enough to protect standard induction motors during a locked-rotor event without nuisance tripping on normal starts. Phase-failure sensitivity is built in: the relay trips at 130 % of Ir on two phases when the third drops to zero, which is the standard IEC requirement for preventing single-phasing damage. Mounts directly under a TeSys D or TeSys F contactor, or on a DIN rail with specific accessories. The 70 mm width and 115 mm depth keep the footprint compact for dense panel layouts — no extra side clearance needed for the reset push-button. Power circuit connections use lugs-ring terminals (M10, torque 11.3 N·m); control circuit wiring uses screw-clamp terminals accepting 1…2.5 mm² flexible or solid. The 17.5 mm connection pitch aligns with standard terminal-block spacing. Certified to IEC 60947-4-1, 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, and GB/T 14048.4 / 14048.5 — so it is accepted in panels destined for North America, Europe, and China without additional component-level testing.","metaTitle":"Schneider Electric LRD3359A66 TeSys Deca Thermal Overload Re","metaDescription":"Schneider Electric LRD3359A66 TeSys Deca differential thermal overload relay, 48–65 A adjustment range, Class 10A, 1000 V IEC / 600 V UL/CSA. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Overload Relays"],"specifications":{"Depth":"115 mm","Range":"TeSys","Width":"70 mm","title":"LRD3359A66","Height":"81 mm","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","description":"Thermal overload relay,TeSys Deca,48-65A,class 10A,1000V","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":"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":"LRD","Network frequency":"0...400 Hz","Relay application":"Motor protection","Tightening torque":"Control circuit: 1.7 N.m - on screw clamp terminals Power circuit: 11.3 N.m - on lugs-ring terminals M10","Climatic withstand":"conforming to IACS E10","Tripping threshold":"1.14 +/- 0.06 Ir conforming to IEC 60947-4-1","Dielectric strength":"2.2 kV at 50 Hz conforming to IEC 60947-1","Permissible current":"0.72 A at 500 V AC-15 for signalling circuit 0.06 A at 440 V DC-13 for signalling circuit","Mechanical robustness":"Vibrations: 6 Gn conforming to IEC 60068-2-6 Shocks: 15 Gn for 11 ms conforming to IEC 60068-2-7","Associated fuse rating":"4 A gG for signalling circuit 4 A BS for signalling circuit","Thermal overload class":"Class 10A conforming to IEC 60947-4-1","Connections - terminals":"Control circuit: screw clamp terminals 2 cable(s) 1...2.5 mm² flexible without cable end Control circuit: screw clamp terminals 2 cable(s) 1...2.5 mm² flexible with cable end Control circuit: screw clamp terminals 2 cable(s) 1...2.5 mm² solid without cable end Power circuit: lugs-ring terminals","IP degree of protection":"IP20 conforming to IEC 60529","Temperature compensation":"-20...60 °C","Phase failure sensitivity":"Tripping current 130 % of Ir on two phase, the last one at 0","Product or component type":"Differential thermal overload relay","Auxiliary contact composition":"1 NO + 1 NC","[Ui] rated insulation voltage":"Power circuit: 1000 V conforming to IEC 60947-4-1 Power circuit: 600 V conforming to CSA Power circuit: 600 V conforming to UL","[Ue] rated operational voltage":"1000 V AC 0...400 Hz for power circuit conforming to IEC 60947-4-1","Ambient air temperature for storage":"-60...70 °C","Thermal protection adjustment range":"48...65 A","Ambient air temperature for operation":"-20...60 °C without derating conforming to IEC 60947-4-1","[Uimp] rated impulse withstand voltage":"6 kV conforming to IEC 60947-1","[Ith] conventional free air thermal current":"5 A for signalling circuit"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/577c444fefd7c078cc977185a4d18ad1.pdf","sourceUrl":"https://www.se.com/sa/en/product/LRD3359A66/thermal-overload-relaytesys-deca4865aclass-10a1000v/"},"ai":{"faq":[{"question":"What is the thermal adjustment range of the LRD3359A66?","answer":"The thermal protection adjustment range is 48…65 A. Set the dial to the motor's full-load current within that band."},{"question":"What standards does the LRD3359A66 comply with?","answer":"It complies with IEC 60947-4-1, 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, and GB/T 14048.4 / 14048.5. This covers most global panel certifications."},{"question":"Does the LRD3359A66 provide phase-failure protection?","answer":"Yes. It trips at 130 % of Ir on two phases when the third phase current drops to zero, meeting the IEC requirement for single-phasing prevention."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LRD3359A66","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/LRD3359A66 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}