{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LUCA12BTQ","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LUCA12BTQ","canonicalUrl":"https://aoctrl.com/schneider/LUCA12BTQ","factsUrl":"https://aoctrl.com/api/mcp/products/LUCA12BTQ","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys U standard control unit LUCA12BTQ, 24 V AC control voltage, for 3-phase motor protection up to 5.5 kW at 400 V, Class 10 thermal overload, plug-in front face.","salesMarkdown":"## What this control unit does The Schneider LUCA12BTQ is a standard control unit in the TeSys U motor starter range, designed for basic motor protection: overload, short-circuit, phase failure, and earth fault. It operates on a 24 V AC control circuit and is rated for motor power up to 5.5 kW at 400...440 V AC, 5.5 kW at 500 V AC, and 9 kW at 690 V AC. Mounts via plug-in front face onto a TeSys U power base or contactor — no DIN-rail tool needed, just snap it in. Dimensions are 66 mm high, 45 mm wide, 60 mm deep, fitting the standard TeSys U footprint. IP20 on the front panel and wired terminals; IP40 on the front panel outside the connection zone. Control circuit voltage limits are 20...26.5 V AC for operation, with dropout at 14.5 V AC — so a saggy 24 V supply that dips below 20 V will drop the starter out, which matters if you're sharing a control transformer with other loads. ## Protection and coordination Tripping threshold is 14.2 x Ir ±20 %, giving a short-circuit trip fast enough to coordinate with most upstream MCCBs or fuses. Phase failure sensitivity is built in — no separate module needed. Immunity to microbreaks is 3 ms, so brief line sags won't cause nuisance dropouts. Safe separation of 400 V SELV between control/auxiliary and main circuits means you can share a 24 V control bus without worrying about creepage to line voltage.","metaTitle":"Schneider LUCA12BTQ TeSys U Control Unit, 24 V AC, 5.5 kW","metaDescription":"Schneider LUCA12BTQ TeSys U standard control unit, 24 V AC coil, 5.5 kW at 400 V, Class 10 overload protection. Current lifecycle. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Motor Starters"],"specifications":{"Depth":"60 mm","Range":"TeSys","Width":"45 mm","Height":"66 mm","Load type":"3-phase motor - cooling: 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 U","Motor power kW":"5.5 kW at 400...440 V AC 50/60 Hz 5.5 kW at 500 V AC 50/60 Hz 9 kW at 690 V AC 50/60 Hz","Operating time":"35 ms opening with LUB12 for control circuit 35 ms opening with LUB32 for control circuit 35 ms opening with LUB38 for control circuit 70 ms closing with LUB12 for control circuit 70 ms closing with LUB32 for control circuit 70 ms closing with LUB38 for control circuit","Fire resistance":"960 °C parts supporting live components conforming to IEC 60695-2-12 650 °C conforming to IEC 60695-2-12","lifecycle_stage":"current","Heat dissipation":"2 W for control circuit with LUB12 3 W for control circuit with LUB32 3 W for control circuit with LUB38","Range of product":"TeSys U","Shock resistance":"10 gn power poles open conforming to IEC 60068-2-27 15 gn power poles closed conforming to IEC 60068-2-27","Device short name":"LUCA","Network frequency":"40...60 Hz","Compatibility code":"LUCA","Device application":"Motor control Motor protection","Operating altitude":"2000 m","Tripping threshold":"14.2 x Ir +/- 20 %","Protective treatment":"TH conforming to IEC 60068","Utilisation category":"AC-44 AC-43 AC-41","Vibration resistance":"2 gn, 5...300 Hz, power poles open conforming to IEC 60068-2-6 4 gn, 5...300 Hz, power poles closed conforming to IEC 60068-2-6","Thermal overload class":"Class 10 - frequency limit: 40...60 Hz - temperature compensation: -25...70 °C conforming to IEC 60947-6-2 Class 10 - frequency limit: 40...60 Hz - temperature compensation: -25...70 °C conforming to UL 508","IP degree of protection":"IP20 front panel and wired terminals conforming to IEC 60947-1 IP20 other faces conforming to IEC 60947-1 IP40 front panel outside connection zone conforming to IEC 60947-1","Immunity to microbreaks":"3 ms","Main Function Available":"Manual reset Protection against phase failure and phase imbalance Protection against overload and short-circuit Earth fault protection","Immunity to voltage dips":"70 % / 500 ms conforming to IEC 61000-4-11","Phase failure sensitivity":"Yes","Product or component type":"Standard control unit","Non-dissipating shock wave":"1 kV serial mode conforming to IEC 60947-6-2 2 kV common mode conforming to IEC 60947-6-2","Safe separation of circuit":"400 V SELV between the control and auxiliary circuits conforming to IEC 60947-1 400 V SELV between the control or auxiliary circuit and the main circuit conforming to IEC 60947-1","Typical current consumption":"140 mA at 24 V AC I maximum while closing with LUB12 220 mA at 24 V AC I maximum while closing with LUB32 220 mA at 24 V AC I maximum while closing with LUB38 70 mA at 24 V AC I rms sealed with LUB12 90 mA at 24 V AC I rms sealed with LUB32 90 mA at 24 V AC I rms sealed with LUB38","Product specific application":"Basic protection requirements for motor starters: overload and short-circuit","[Uc] control circuit voltage":"24 V AC","Resistance to fast transients":"2 kV class 3 serial link conforming to IEC 61000-4-4 4 kV class 4 all circuits except for serial link conforming to IEC 61000-4-4","Resistance to radiated fields":"10 V/m 3 conforming to IEC 61000-4-3","[Ui] rated insulation voltage":"690 V conforming to IEC 60947-6-2 600 V conforming to UL 60947-4-1 600 V conforming to CSA C22.2 No 60947-4-1","Control circuit voltage limits":"20...26.5 V for AC circuit 24 V in operation 14.5 V for AC circuit 24 V drop-out","[Ue] rated operational voltage":"690 V AC","Immunity to radioelectric fields":"10 V conforming to IEC 61000-4-6","Ambient air temperature for storage":"-40...85 °C","Rated Motor Current Adjustment Range":"3...12 A","Ambient air temperature for operation":"-25...70 °C","Resistance to electrostatic discharge":"8 kV level 3 in open air conforming to IEC 61000-4-2 8 kV level 4 on contact conforming to IEC 61000-4-2","[Uimp] rated impulse withstand voltage":"6 kV conforming to IEC 60947-6-2"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/96f8e1babcf414b9dadf6eb9ae344588.pdf","sourceUrl":"https://www.se.com/sg/en/product/LUCA12BTQ/standard-control-unit-tesys-u-312a-3p-motors-thermal-magnetic-protection-class-10-coil-24v-ac-tq10/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LUCA12BTQ/alternatives.json"},"ai":{"faq":[{"question":"Does LUCA12BTQ work with LUB12?","answer":"Yes, the LUCA12BTQ is designed to operate with LUB12, LUB32, and LUB38 control circuit interfaces. Opening time is 35 ms and closing time is 70 ms with any of these."},{"question":"What is the difference between LUCA12BTQ and LUCA12BL?","answer":"The key difference is the control voltage: LUCA12BTQ uses 24 V AC, while LUCA12BL uses a different coil voltage. Both are standard control units in the TeSys U family with the same protection functions and Class 10 overload class."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LUCA12BTQ","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/LUCA12BTQ 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}}