{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LRD350","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LRD350","canonicalUrl":"https://aoctrl.com/schneider/LRD350","factsUrl":"https://aoctrl.com/api/mcp/products/LRD350","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys Deca LRD350, differential thermal overload relay, 37–50 A adjustment range, Class 10A.","salesMarkdown":"The Schneider LRD350 is a differential thermal overload relay from the TeSys Deca range, sized for motor protection in the 37–50 A band. Trips on a Class 10A curve (per IEC 60947-4-1), with phase-failure sensitivity tripping at 130% of Ir on two phases and zero on the third. Auxiliary contact composition is 1 NO + 1 NC, rated for signaling circuits up to 0.95 A at 380 V AC-15 or 0.06 A at 440 V DC-13. Mounting options include plate, rail (with accessories), or direct under the contactor. Power terminals use EverLink BTR screw connectors accepting 1–35 mm² conductors. Flame retardance is V1 (UL 94), dielectric strength 1.89 kV at 50 Hz, and impulse withstand 6 kV.","metaTitle":"Schneider LRD350 Thermal Overload Relay, 37-50A, Class 10A","metaDescription":"Active TeSys Deca differential thermal overload relay. 37–50 A adjustment range, Class 10A, 1 NO + 1 NC contacts. Sourced to order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":[],"specifications":{"Depth":"4.8 in (123 mm)","Range":"TeSys TeSys Deca","Width":"2.2 in (55 mm)","Height":"2.8 in (70 mm)","Category":"US10I1222347","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 EN 50495","Control type":"Red push-button stop Blue push-button reset","Network type":"DC AC","Product name":"TeSys LRD TeSys Deca","lifecycle_stage":"current","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 15.05 lbf.in (1.7 N.m) screw clamp terminals Power circuit 44.3 lbf.in (5 N.m) EverLink BTR screw connectors","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 EverLink BTR screw connectors 1 0.002...0.05 in² (1...35 mm²) flexible without cable end Power circuit EverLink BTR screw connectors 1 0.002...0.05 in² (1...35 mm²) flexible with cable end Power circuit EverLink BTR screw connectors 1 0.002...0.05 in² (1...35 mm²) solid without cable end","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":"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":"37...50 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":"$53.34","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2dc43bec6131e7a1874332d6491e76a9.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/LRD350/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of the LRD350?","answer":"Thermal protection adjustment range 37–50 A, Class 10A, 1 NO + 1 NC auxiliary contacts. Rated insulation voltage 690 V IEC, impulse withstand 6 kV."},{"question":"What compliance standards does the LRD350 meet?","answer":"It complies with 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, and EN 50495."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LRD350","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/LRD350 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:21:01.794Z","lastPublished":"2026-09-02T08:21:01.794Z","indexable":true}}