{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LUCB12ES","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LUCB12ES","canonicalUrl":"https://aoctrl.com/schneider/LUCB12ES","factsUrl":"https://aoctrl.com/api/mcp/products/LUCB12ES","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys Ultra LUCB12ES advanced control unit, AC-43 motor protection, 5.5 kW at 400 V, manual reset, 48 V AC / 48-72 V DC control.","salesMarkdown":"The Schneider LUCB12ES advanced control unit from the TeSys Ultra series handles motor protection for three-phase self-cooled motors — covering overload, short-circuit, earth fault, and phase failure or imbalance. It carries a manual reset, which is typical in applications where automatic restart after a fault is not permitted. Rated for AC-43, AC-41, and AC-44 utilisation categories, it suits motor switching duty, with opening times of 35 ms and closing times of 60 ms when paired with a LUB12, LUB32, or LUB38 control circuit. Motor power capability reaches 5.5 kW at 400 V, 5.5 kW at 500 V, and 9 kW at 690 V. AC-43 governs duty, with Class 10 thermal overload per IEC 60947-6-2 and UL 508, tripping threshold 14.2 × Ir ± 20 %, and phase failure sensitivity. The unit mounts plug-in on the front face, with IP20 front panel and wired terminals and IP40 front panel outside the connection zone; dimensions are 66 mm high × 45 mm wide × 60 mm deep. Control voltage is 48 V AC or 48–72 V DC; sealed current draw ranges from 35 mA to 45 mA depending on the control circuit variant, and heat dissipation is 2–3 W.","metaTitle":"Schneider LUCB12ES TeSys Ultra Control Unit, AC-43 Motor Pro","metaDescription":"Schneider LUCB12ES advanced control unit for motor protection (overload, short-circuit, earth fault). Rated AC-43, manual reset, 48 V AC/DC. Current production. Inquire for pricing","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","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":"5.5 kW 400...440 V AC 50/60 Hz 5.5 kW 500 V AC 50/60 Hz 9 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 60 ms closing with LUB12 control circuit 60 ms closing with LUB32 control circuit 60 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-41 AC-44","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":"Protection against overload and short-circuit Earth fault protection Protection against phase failure and phase imbalance Manual reset","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":"280 mA 48 V AC I maximum while closing with LUB12 280 mA 48 V AC I maximum while closing with LUB32 280 mA 48 V AC I maximum while closing with LUB38 280 mA 48...72 V DC I maximum while closing with LUB12 280 mA 48...72 V DC I maximum while closing with LUB32 280 mA 48...72 V DC I maximum while closing with LUB38 35 mA 48 V AC I rms sealed with LUB12 45 mA 48 V AC I rms sealed with LUB32 45 mA 48 V AC I rms sealed with LUB38 35 mA 48...72 V DC I rms sealed with LUB12 45 mA 48...72 V DC I rms sealed with LUB32 45 mA 48...72 V DC I rms sealed with LUB38","Product Specific Application":"Basic protection and advanced functions, communication","[Uc] control circuit voltage":"48 V AC 48...72 V DC","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":"38.5...72 V AC 48 V in operation 38.5...93 V DC 48...72 V in operation 29 V AC 48 V drop-out 29 V DC 48...72 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":"3...12 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":"$69.85 – $162.59","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f2b76457058e9c08fb89d56b8bf57a62.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/LUCB12ES/alternatives.json"},"ai":{"faq":[{"question":"What compliance standards does the LUCB12ES meet?","answer":"It complies with EN 60947-6-2, IEC 60947-6-2, UL 60947-4-1, and CSA C22.2 No 60947-4-1 (with phase barrier)."},{"question":"What are the key ratings of the LUCB12ES?","answer":"It is an AC-43 advanced control unit rated for motor protection (overload, short-circuit, earth fault, phase failure). It handles up to 5.5 kW at 400 V, has manual reset, and operates with a 48 V AC or 48–72 V DC control circuit. The tripping threshold is 14.2 × Ir ± 20 %, and it offers IP20/IP40 protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LUCB12ES","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/LUCB12ES 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}}