{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LUCB18BLTQ","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LUCB18BLTQ","canonicalUrl":"https://aoctrl.com/schneider/LUCB18BLTQ","factsUrl":"https://aoctrl.com/api/mcp/products/LUCB18BLTQ","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys U series, LUCB18BLTQ advanced control unit, 7.5 kW at 400...440 V AC, manual reset, 24 V DC control, IP20 front panel.","salesMarkdown":"The LUCB18BLTQ is an advanced control unit in the TeSys U range, designed for motor control and protection of three-phase motors. It handles motor power ratings of 7.5 kW at 400...440 V AC, 9 kW at 500 V AC, and 15 kW at 690 V AC (50/60 Hz). This unit provides protection against overload, short-circuit, phase failure, phase imbalance, and earth fault. It features manual reset and a Class 10 thermal overload characteristic, temperature-compensated from -25 to 70 °C per IEC 60947-6-2 and UL 508. The control circuit runs on 24 V DC, drawing 220 mA peak during closing and 80 mA sealed. The control voltage limits are 20...27 V DC for operation, with dropout at 14.5 V DC. Rated insulation voltage is 690 V per IEC 60947-6-2, 600 V per UL 60947-4-1 and CSA C22.2 No 60947-4-1. That 690 V figure means it can be used on 400 V systems with full headroom, and on 690 V systems where available. Utilisation categories AC-41, AC-43, and AC-44 cover resistive, motor, and severe motor duty. AC-44 is the heavy lifting category — switching motors with frequent starts and stops, which is the real-world load for conveyors and compressors. Tripping threshold is 14.2 x Ir ±20 %. That's the magnetic short-circuit trip point — set it via the power base's Ir rating, and the unit clears faults fast enough for coordination with upstream breakers. IP20 on the front panel and wired terminals, IP40 on the front panel outside the connection zone. Plug-in mounting on the front face — it snaps onto the TeSys U power base (LUB32 or LUB38). Dimensions are 45 mm wide, 66 mm high, 60 mm deep. That 45 mm width is a single modular pitch on a DIN rail, so it fits standard panel layouts. The control circuit draws 3 W heat dissipation with either LUB32 or LUB38 base. Safe separation of circuits is 400 V SELV between control/auxiliary and main circuits per IEC 60947-1. That means the 24 V DC control wiring can share a cable tray with the power wiring without extra insulation barriers. 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). The UL and CSA marks mean it is accepted in North American panels without additional evaluation. Fire resistance tested to 960 °C on parts supporting live components per IEC 60695-2-12, and 650 °C on other parts. Protective treatment is TH conforming to IEC 60068 for tropical environments. Immunity to fast transients is 2 kV class 3 on the serial link and 4 kV class 4 on all other circuits per IEC 61000-4-4. Radiated field immunity is 10 V/m per IEC 61000-4-3. Voltage dip immunity is 70 % for 500 ms per IEC 61000-4-11.","metaTitle":"TeSys LUCB18BLTQ Advanced Control Unit, 7.5-15 kW","metaDescription":"TeSys U LUCB18BLTQ advanced control unit for 3-phase motor protection. 7.5 kW at 400 V, manual reset, Class 10, 24 V DC. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Motor Starters"],"specifications":{"Depth":"60 mm","Range":"TeSys","Reset":"Manual reset","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":"7.5 kW at 400...440 V AC 50/60 Hz 9 kW at 500 V AC 50/60 Hz 15 kW at 690 V AC 50/60 Hz","Operating time":"35 ms opening with LUB32 for control circuit 35 ms opening with LUB38 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":"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":"LUCB","Network frequency":"40...60 Hz","Compatibility code":"LUCB","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":"Protection against overload and short-circuit Manual reset Protection against phase failure and phase imbalance Earth fault protection","Immunity to voltage dips":"70 % / 500 ms conforming to IEC 61000-4-11","Phase failure sensitivity":"Yes","Product or component type":"Advanced control unit","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":"220 mA at 24 V DC I maximum while closing with LUB32 220 mA at 24 V DC I maximum while closing with LUB38 80 mA at 24 V DC I rms sealed with LUB32 80 mA at 24 V DC I rms sealed with LUB38","Product specific application":"Basic protection and advanced functions, communication","[Uc] control circuit voltage":"24 V DC","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...27 V for DC circuit 24 V in operation 14.5 V for DC 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":"4.5...18 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/1d4ef74c867751168c181d4b3c39e5b3.pdf","sourceUrl":"https://www.se.com/sg/en/product/LUCB18BLTQ/advanced-control-unit-tesys-u-4-518a-3p-motors-protection-diagnostic-class-10-coil-24v-dc-tq10/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LUCB18BLTQ/alternatives.json"},"ai":{"faq":[{"question":"What are the key protection functions of LUCB18BLTQ?","answer":"It provides protection against overload, short-circuit, phase failure, phase imbalance, and earth fault. It has manual reset and a Class 10 thermal overload characteristic."},{"question":"What is the control voltage for LUCB18BLTQ?","answer":"The control circuit voltage is 24 V DC. Operating range is 20...27 V DC, with dropout at 14.5 V DC. Peak draw is 220 mA during closing, 80 mA sealed."},{"question":"What standards does LUCB18BLTQ comply with?","answer":"It complies with 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)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LUCB18BLTQ","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/LUCB18BLTQ 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}}