{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LUCB38BL","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LUCB38BL","canonicalUrl":"https://aoctrl.com/schneider/LUCB38BL","factsUrl":"https://aoctrl.com/api/mcp/products/LUCB38BL","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys Ultra advanced control unit, LUCB38BL, manual reset, 18.5 kW at 400-440 V AC to 22 kW at 690 V AC, plug-in front face, 45 x 66 x 60 mm.","salesMarkdown":"It's the part that decides when to trip, not the power contactor itself. Rated for utilisation category AC-43 per IEC 60947-6-2, meaning it's built for the high inrush and inductive load of a motor start — not a resistive heater bank. The thermal overload class is Class 10, temperature-compensated from -25 to 70 °C, so it tracks motor heating accurately across the panel's ambient range. Tripping threshold is set at 14.2 x Ir ±20 %, which gives a short-circuit protection band that coordinates with upstream breakers. Phase failure and phase imbalance sensitivity are built in — no add-on module needed for that. Motor power: 18.5 kW at 400-440 V AC, 18.5 kW at 500 V, and 22 kW at 690 V. That's the motor nameplate kW it can protect — size your motor within these bands and the thermal curve matches. The control circuit runs on 24 V DC, drawing 220 mA peak while closing (with the LUB38 interface) and 80 mA sealed. Mounts via plug-in front face onto a TeSys Ultra base — no tools needed for replacement, which is the whole point when a line-down swap is measured in minutes. IP20 on the front panel and wired terminals, IP40 outside the connection zone. That's fine for a clean IP54 or IP65 enclosure; it's not rated for washdown itself. Safe separation of circuits at 400 V SELV between control and main circuits per IEC 60947-1 — important when the PLC side needs to stay isolated from motor power. Compliance documentation covers the major industrial markets: IEC 60947-6-2, UL 60947-4-1 with phase barrier, CSA C22.2 No 60947-4-1 with phase barrier. Fire resistance at 960 °C on live-part supports, 650 °C elsewhere per IEC 60695-2-12.","metaTitle":"Schneider Electric LUCB38BL TeSys Ultra Advanced Control Uni","metaDescription":"Schneider Electric LUCB38BL TeSys Ultra advanced control unit for 3-phase motor protection. Rated 18.5-22 kW at 400-690 V AC. Manual reset, plug-in front face. IEC/UL/CSA certified","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","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 Ultra","Motor power kW":"18.5 kW at 400...440 V AC 50/60 Hz 18.5 kW at 500 V AC 50/60 Hz 22 kW at 690 V AC 50/60 Hz","Operating time":"35 ms opening with LUB38 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 LUB38","Range of product":"TeSys Ultra","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-43","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 phase failure and phase imbalance Protection against overload and short-circuit Earth fault protection Manual reset","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 LUB38 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":"9.5...38 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":"$70.87","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://www.se.com/sg/en/product/LUCB38BL/advanced-control-unit-tesys-ultra-3p-9-5-to-38a-690vac-protection-diagnostic-class-10-24vdc-coil/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LUCB38BL/alternatives.json"},"ai":{"faq":[{"question":"What motor power range does the LUCB38BL cover?","answer":"It covers 18.5 kW at 400-440 V AC and 500 V AC, and 22 kW at 690 V AC, all at 50/60 Hz. That's the motor nameplate rating it protects."},{"question":"What standards does the LUCB38BL comply with?","answer":"It complies with IEC 60947-6-2, UL 60947-4-1 with phase barrier, and CSA C22.2 No 60947-4-1 with phase barrier. Fire resistance is 960 °C on live-part supports per IEC 60695-2-12."},{"question":"How do I get current pricing and availability for the LUCB38BL?","answer":"Submit an RFQ through the distributor. Availability and current pricing are confirmed at quote time — this is an active-production part with normal supply chain support."},{"question":"What is the LUCB38BL's physical size and mounting?","answer":"Dimensions are 45 mm wide, 66 mm deep, 60 mm high. It mounts via plug-in front face onto a TeSys Ultra base — no tools needed for replacement."},{"question":"What protection functions does the LUCB38BL include?","answer":"It provides protection against overload and short-circuit, phase failure and phase imbalance, and earth fault. Manual reset is standard. Tripping threshold is 14.2 x Ir ±20 %."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LUCB38BL","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/LUCB38BL 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}}