{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LUCD38BL","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LUCD38BL","canonicalUrl":"https://aoctrl.com/schneider/LUCD38BL","factsUrl":"https://aoctrl.com/api/mcp/products/LUCD38BL","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys Ultra advanced control unit LUCD38BL, 24 V DC, motor protection 18.5-22 kW, AC-43, Class 20, plug-in front face.","salesMarkdown":"## TeSys Ultra control unit for motor protection and advanced functions It handles motor power ratings of 18.5 kW at 400...440 V AC, 18.5 kW at 500 V AC, and 22 kW at 690 V AC, all at 50/60 Hz. The control circuit runs on 24 V DC, drawing 220 mA during closing and 80 mA sealed (with LUB38 interface). This unit provides protection against overload, short-circuit, phase failure, phase imbalance, and earth faults, with a manual reset. The thermal overload class is Class 20 with temperature compensation from -25 to 70 °C, conforming to IEC 60947-6-2 and UL 508. The tripping threshold is set at 14.2 x Ir ±20 %, and phase failure sensitivity is built in. Rated for AC-43 utilisation category, the LUCD38BL is suited for starting and stopping squirrel-cage motors with inching or plugging duty. Safe separation of circuits is maintained at 400 V SELV between control/auxiliary and main circuits per IEC 60947-1. The unit mounts via plug-in front face onto a compatible TeSys Ultra base, with IP20 protection on the front panel and wired terminals. ## Standards compliance and environmental ratings Environmental protection includes TH treatment conforming to IEC 60068 for tropical environments. Fire resistance is rated at 960 °C for parts supporting live components and 650 °C for other parts per IEC 60695-2-12. Operating altitude is limited to 2000 m. The unit withstands shock at 10 gn with power poles open and 15 gn with poles closed, and vibration at 2 gn (poles open) and 4 gn (poles closed) over 5-300 Hz. Immunity to microbreaks is 3 ms, and the unit withstands voltage dips of 70 % for 500 ms per IEC 61000-4-11. Resistance to fast transients is 2 kV class 3 on serial links 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. The LUCD38BL is a plug-in front-face control unit for the TeSys Ultra system. Dimensions are 45 mm wide, 66 mm high, and 60 mm deep. It interfaces with the LUB38 control circuit interface for operating times of 35 ms opening and 70 ms closing. Heat dissipation is 3 W for the control circuit with LUB38. The unit supports communication and advanced functions beyond basic protection. It is designed for integration into motor control centres and panel builds where space is at a premium, given its compact 45 mm width. The plug-in design allows quick replacement without disturbing power wiring.","metaTitle":"Schneider Electric LUCD38BL TeSys Ultra Control Unit, 18.5-2","metaDescription":"Schneider Electric LUCD38BL TeSys Ultra advanced control unit. 24 V DC, motor protection up to 22 kW at 690 V. AC-43, Class 20. Current production, sourced to order. Request quote.","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":"LUCD","Network frequency":"40...60 Hz","Compatibility code":"LUCD","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 20 - frequency limit: 40...60 Hz - temperature compensation: -25...70 °C conforming to IEC 60947-6-2 Class 20 - 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":"$71.11","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://www.se.com/ie/en/product/LUCD38BL/advanced-control-unit-tesys-ultra-3p-9-5-to-38a-690vac-protection-diagnostic-class-20-24vdc-coil/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LUCD38BL/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for LUCD38BL?","answer":"The LUCD38BL handles motor power up to 22 kW at 690 V AC, operates on 24 V DC control voltage, and provides Class 20 thermal overload protection with AC-43 utilisation category. It measures 45 x 66 x 60 mm."},{"question":"What protection functions does LUCD38BL provide?","answer":"The LUCD38BL provides protection against overload, short-circuit, phase failure, phase imbalance, and earth faults, with manual reset and phase failure sensitivity."},{"question":"What compliance standards does LUCD38BL meet?","answer":"The LUCD38BL 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). Rated insulation voltage is 690 V per IEC and 600 V per UL/CSA."},{"question":"Where can I buy LUCD38BL and what is the lead time?","answer":"The LUCD38BL is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LUCD38BL","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/LUCD38BL 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}}