{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LRD3322A66","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LRD3322A66","canonicalUrl":"https://aoctrl.com/schneider/LRD3322A66","factsUrl":"https://aoctrl.com/api/mcp/products/LRD3322A66","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys LRD differential thermal overload relay, LRD3322A66, 17-25 A adjustment range, Class 10A, 1000 V AC, UL/CSA/CE.","salesMarkdown":"The Schneider Electric TeSys LRD3322A66 is a differential thermal overload relay for motor protection, with a thermal protection adjustment range of 17...25 A and a tripping class of Class 10A per IEC 60947-4-1. It is designed for direct mounting under a contactor and provides phase failure sensitivity — tripping at 130% of Ir on two phases with the third at zero. The 17...25 A adjustment range sets the motor full-load current window; set the dial to the motor nameplate FLA. Class 10A means the relay trips within 10 seconds at 7.2x the current setting — fast enough for most standard induction motor starts but not for high-inertia loads that need a Class 20 or 30. The 1.14 ± 0.06 Ir tripping threshold per IEC 60947-4-1 means the relay will trip between 108% and 120% of the set current under steady overload. Rated insulation voltage (Ui) is 1000 V for the power circuit per IEC 60947-4-1, and 600 V per UL/CSA — confirm your system voltage against the applicable standard for your jurisdiction. The auxiliary contact composition is 1 NO + 1 NC, rated 0.72 A at 500 V AC-15 for signalling circuits. Certified to 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 GB/T 14048.4/5. Flame retardance rating V1 per UL 94. IP20 finger-safe protection per IEC 60529. ## Integration Notes Mounts directly under a TeSys contactor or on a plate/rail with specific accessories. Dimensions: 81 mm height, 70 mm width, 115 mm depth. Control circuit terminals are screw clamp, accepting 1...2.5 mm² flexible or solid wire. Power circuit uses lugs-ring terminals with M10 hardware, torqued to 11.3 N·m.","metaTitle":"Schneider TeSys LRD3322A66 thermal overload relay, 17-25 A,","metaDescription":"Schneider Electric TeSys LRD3322A66 differential thermal overload relay. 17-25 A, Class 10A, 1000V. Obsolete — sourced to order against RFQ. UL/CSA/CE certified.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Overload Relays"],"specifications":{"Depth":"115 mm","Range":"TeSys","Width":"70 mm","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","Control type":"Red push-button: stop Blue push-button: reset","Network type":"AC DC","Product name":"TeSys LRD","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","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":"17...25 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,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a226710d06d529a7faadc3fc44d80aed.pdf","sourceUrl":"https://www.se.com/au/en/product/LRD3322A66/tesys-lrd-thermal-overload-relays-17-25-a-class-10a-1000v/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LRD3322A66/alternatives.json"},"ai":{"faq":[{"question":"What is the thermal adjustment range of the LRD3322A66?","answer":"The adjustment range is 17...25 A. Set the dial to match the motor nameplate full-load current."},{"question":"What standards does the LRD3322A66 comply with?","answer":"It is certified to 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 GB/T 14048.4/5. It also carries a V1 flame retardance rating per UL 94."},{"question":"What is the physical size of the LRD3322A66?","answer":"Dimensions are 81 mm height, 70 mm width, and 115 mm depth. It mounts directly under a TeSys contactor or on a plate/rail with accessories."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LRD3322A66","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/LRD3322A66 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}}