{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LUCB05B","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LUCB05B","canonicalUrl":"https://aoctrl.com/schneider/LUCB05B","factsUrl":"https://aoctrl.com/api/mcp/products/LUCB05B","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys Ultra, Advanced control unit, LUCB05B, Manual reset, Plug-in front face, 24 V AC control circuit, AC-43/44/41, 1.5 kW at 400 V, IP20 front face.","salesMarkdown":"The Schneider Electric TeSys Ultra LUCB05B is an advanced control unit for protecting and controlling 3-phase self-cooled motors, rated for utilization categories AC-41, AC-43, and AC-44. It integrates overload, short-circuit, earth fault, and phase failure protection in a single plug-in package with manual reset. Motor power: 1.5 kW at 400 V, 2.2 kW at 500 V, 3 kW at 690 V AC; utilisation categories AC-43, AC-44, AC-41; thermal overload Class 10; heat dissipation 2–3 W. Control circuit voltage is fixed at 24 V AC; inrush current peaks at 220 mA when closing, dropping to 90 mA sealed. The control circuit is safely isolated from the main circuit at 400 V SELV. Minimum operating time is 35 ms opening, 70 ms closing — fast enough to protect motors under short-circuit conditions when paired with a TeSys Ultra circuit breaker or contactor. The unit plugs into the TeSys Ultra base; front-face access means no rear wiring. Dimensions: 2.4 in (60 mm) deep, 1.8 in (45 mm) wide, 2.6 in (66 mm) high — occupies roughly a single contactor footprint. Rated IP20 on the front panel and wired terminals, IP40 front panel outside connection zone. Vibration resistance is 2 gn open poles, 4 gn closed; shock 10 gn open, 15 gn closed — suitable for machinery with moderate vibration. Compliance covers IEC 60947-6-2 and UL 60947-4-1 with phase barrier.","metaTitle":"Schneider Electric LUCB05B TeSys Ultra Control Unit, AC-43/4","metaDescription":"Advanced control unit for 3-phase motor protection. Manual reset, plug-in, 24 V AC. AC-43/44/41 rated up to 3 kW at 690 V. Active production. IEC/UL 60947-4-1.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":[],"specifications":{"Depth":"2.4 in (60 mm)","Range":"TeSys","Reset":"Manual reset","Width":"1.8 in (45 mm)","Height":"2.6 in (66 mm)","Category":"US10I1122397","Load type":"3-phase motor self-cooled","Standards":"EN 60947-6-2 IEC 60947-6-2 UL 60947-4-1, with phase barrier CSA C22.2 No 60947-4-1, with phase barrier","Fixing mode":"Plug-in (front face)","Product name":"TeSys Ultra","Motor power kW":"1.5 kW 400...440 V AC 50/60 Hz 2.2 kW 500 V AC 50/60 Hz 3 kW 690 V AC 50/60 Hz","Operating time":"35 ms opening with LUB12 control circuit 35 ms opening with LUB32 control circuit 35 ms opening with LUB38 control circuit 70 ms closing with LUB12 control circuit 70 ms closing with LUB32 control circuit 70 ms closing with LUB38 control circuit","Fire resistance":"1760 °F (960 °C) parts supporting live components IEC 60695-2-12 1202 °F (650 °C) IEC 60695-2-12","lifecycle_stage":"current","Heat dissipation":"2 W control circuit with LUB12 3 W control circuit with LUB32 3 W control circuit with LUB38","Range of Product":"TeSys Ultra","Shock resistance":"10 gn power poles open IEC 60068-2-27 15 gn power poles closed IEC 60068-2-27","Device short name":"LUCB","Network frequency":"40...60 Hz","Compatibility code":"LUCB","Device Application":"Motor control Motor protection","Operating altitude":"6561.68 ft (2000 m)","Tripping threshold":"14.2 x Ir +/- 20 %","Protective treatment":"TH IEC 60068","Utilisation category":"AC-43 AC-44 AC-41","Vibration resistance":"2 gn 5...300 Hz power poles open IEC 60068-2-6 4 gn 5...300 Hz power poles closed IEC 60068-2-6","Nbr. of units in pkg.":"1","Thermal overload class":"Class 10 40...60 Hz -13...158 °F (-25...70 °C) IEC 60947-6-2 Class 10 40...60 Hz -13...158 °F (-25...70 °C) UL 508","IP degree of protection":"IP20 front panel and wired terminals IEC 60947-1 IP20 other faces IEC 60947-1 IP40 front panel outside connection zone IEC 60947-1","Immunity to microbreaks":"3 ms","Main Function Available":"Earth fault protection Protection against phase failure and phase imbalance Manual reset Protection against overload and short-circuit","Immunity to voltage dips":"70 % / 500 ms IEC 61000-4-11","Phase failure sensitivity":"Yes","Product or Component Type":"Advanced control unit","Non-dissipating shock wave":"1 kV serial mode IEC 60947-6-2 2 kV common mode IEC 60947-6-2","Safe separation of circuit":"400 V SELV between the control and auxiliary circuits IEC 60947-1 400 V SELV between the control or auxiliary circuit and the main circuit IEC 60947-1","Typical current consumption":"140 mA 24 V AC I maximum while closing with LUB12 220 mA 24 V AC I maximum while closing with LUB32 220 mA 24 V AC I maximum while closing with LUB38 70 mA 24 V AC I rms sealed with LUB12 90 mA 24 V AC I rms sealed with LUB32 90 mA 24 V AC I rms sealed with LUB38","Product Specific Application":"Basic protection and advanced functions, communication","[Uc] control circuit voltage":"24 V AC","Resistance to fast transients":"2 kV 3 serial link IEC 61000-4-4 4 kV 4 all circuits except for serial link IEC 61000-4-4","Resistance to radiated fields":"9.1 V/m (10 V/m) 3 IEC 61000-4-3","[Ui] rated insulation voltage":"690 V IEC 60947-6-2 600 V UL 60947-4-1 600 V CSA C22.2 No 60947-4-1","Control circuit voltage limits":"20...26.5 V AC 24 V in operation 14.5 V AC 24 V drop-out","[Ue] rated operational voltage":"690 V AC","Immunity to radioelectric fields":"10 V IEC 61000-4-6","Ambient Air Temperature for Storage":"-40...185 °F (-40...85 °C)","Rated Motor Current Adjustment Range":"1.25...5 A","Ambient air temperature for operation":"-13...158 °F (-25...70 °C)","Resistance to electrostatic discharge":"8 kV 3 in open air IEC 61000-4-2 8 kV 4 on contact IEC 61000-4-2","[Uimp] rated impulse withstand voltage":"6 kV IEC 60947-6-2"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$57.15","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e063fe3b8e8e53cb8e8de897b5f68eba.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/LUCB05B/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of LUCB05B?","answer":"The depth is 2.4 in (60 mm)."},{"question":"What are the key compliance standards for LUCB05B?","answer":"The unit complies with IEC 60947-6-2, UL 60947-4-1 (with phase barrier), and CSA C22.2 No 60947-4-1 (with phase barrier)."},{"question":"What is the motor power rating of LUCB05B?","answer":"Motor power is 1.5 kW at 400 V AC, 2.2 kW at 500 V AC, and 3 kW at 690 V AC (50/60 Hz)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LUCB05B","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/LUCB05B 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}}