{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LUCA05BTQ","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LUCA05BTQ","canonicalUrl":"https://aoctrl.com/schneider/LUCA05BTQ","factsUrl":"https://aoctrl.com/api/mcp/products/LUCA05BTQ","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys U standard control unit LUCA05BTQ, 24 V AC control circuit, for 3-phase motor protection with overload class 10, IP20 front panel.","salesMarkdown":"The Schneider Electric LUCA05BTQ is a standard control unit within the TeSys U range, designed for basic motor protection and control of a 3-phase motor with self-cooled load type. It provides overload and short-circuit protection, plus earth fault and phase failure sensitivity, in a plug-in (front face) format that integrates into a TeSys U starter base. Rated at 1.5 kW at 400...440 V AC 50/60 Hz, 2.2 kW at 500 V AC, and 3 kW at 690 V AC, the unit's thermal overload class 10 (per IEC 60947-6-2 and UL 508) means it will trip within 10 seconds at 7.2× the set current — standard for protecting general-purpose induction motors against locked-rotor conditions without nuisance tripping on normal starts. The control circuit runs on 24 V AC (20...26.5 V operating range, 14.5 V drop-out), drawing 70 mA RMS sealed or up to 220 mA during closing depending on the power base (LUB12/32/38). Operating time is 35 ms opening and 70 ms closing, consistent across all three compatible power bases. The tripping threshold is 14.2 × Ir ± 20 %, meaning the magnetic short-circuit release will fire at roughly 14 times the full-load current setting — fast enough to clear a bolted fault before the power base contacts weld. The unit also offers immunity to microbreaks up to 3 ms and voltage dips down to 70 % for 500 ms, so momentary line sags won't drop out a running motor unnecessarily. Safe separation of 400 V SELV between control/auxiliary and main circuits means the 24 V AC control loop is isolated from line voltage — safe for PLC outputs and panel wiring without extra isolation relays. Utilisation categories AC-41, AC-43, and AC-44 cover resistive, motor, and lightly inductive loads respectively. The unit is certified to EN 60947-6-2, IEC 60947-6-2, UL 60947-4-1 (with phase barrier), and CSA C22.2 No 60947-4-1 (with phase barrier) — so it's accepted in North American and European panels without additional testing. The LUCA05BTQ plugs into the front face of a TeSys U power base (LUB12, LUB32, or LUB38) which then snaps onto a DIN rail. IP20 on the front panel and wired terminals, IP40 on the front face outside the connection zone; suitable for enclosed panels where the front face is operator-accessible. Heat dissipation is 2 W with the LUB12 power base, 3 W with LUB32 or LUB38. In a densely packed panel, that's low enough to avoid forced ventilation for a single starter, but worth summing across a multi-starter group to stay within enclosure thermal limits. No cross-reference or second-source exists within the TeSys U family — the LUCA05BTQ is the specific 24 V AC standard control unit; the LUCA05B is the 24 V DC variant, and the LUCA05F is the 110...240 V AC version. If your BOM calls for 24 V AC, this is the one.","metaTitle":"Schneider Electric LUCA05BTQ TeSys U Standard Control Unit,","metaDescription":"LUCA05BTQ TeSys U standard control unit for 3-phase motor protection. 24 V AC, overload class 10, IP20 front. UL/CSA/EN certified. Available 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":"1.5 kW at 400...440 V AC 50/60 Hz 2.2 kW at 500 V AC 50/60 Hz 3 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-43 AC-41 AC-44","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":"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 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":"1.25...5 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/99fea05f9bb6349cbd3d6a09874a29d7.pdf","sourceUrl":"https://www.se.com/sg/en/product/LUCA05BTQ/standard-control-unit-tesys-u-1-255a-3p-motors-thermal-magnetic-protection-class-10-coil-24v-ac-tq10/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LUCA05BTQ/alternatives.json"},"ai":{"faq":[{"question":"What is the closest alternative to LUCA05BTQ in the TeSys U family?","answer":"The closest alternative is the LUCA05B (24 V DC control circuit) if your panel uses DC control, or the LUCA05F (110...240 V AC) for line-voltage control. Both share the same form factor, protection class, and power ratings. For 24 V AC specifically, the LUCA05BTQ is the correct part."},{"question":"What compliance documentation does LUCA05BTQ carry?","answer":"The unit is certified to EN 60947-6-2, IEC 60947-6-2, UL 60947-4-1 (with phase barrier), and CSA C22.2 No 60947-4-1 (with phase barrier). It also meets IEC 60068 for protective treatment (TH classification) and IEC 60695-2-12 for fire resistance at 960 °C on live-supporting parts."},{"question":"Where can I buy LUCA05BTQ and what is the lead time?","answer":"The LUCA05BTQ is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm lead time and price."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LUCA05BTQ","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/LUCA05BTQ 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}}