Schneider Electric LUCB18B TeSys U Advanced Control Unit 4.5-18 A 24 V AC Motor Starter Module

The Schneider Electric LUCB18B is a TeSys U advanced control unit with an adjustable motor current range of 4.5-18 A, inserted into a compatible power base to form a starter controller for 3-phase motors up to 7.5 kW at 400-440 V AC. It provides Class 10 thermal overload protection, phase-failure sensing, and a 24 V AC control coil, plus a thermal overload alarm managed through an additional function module, and a test push button for overload simulation.

Technical Specifications

Certifications & Standards

• CE
• UL
• CSA
• CCC
• EAC
• ASEFA
• ATEX
• Marine
• EN 60947-6-2
• IEC 60947-6-2
• UL 60947-4-1
• CSA C22.2 No 60947-4-1

Selection Notes

Set Ir within the 4.5-18 A window to match the motor's full-load current; Class 10 tripping at 14.2 x Ir covers standard-duty starts without needing a slower overload class. The advanced control unit adds a thermal overload alarm managed through an additional function module, and a test push button for overload simulation on top of the same overload, short-circuit, phase-failure and earth-fault protection as the standard unit in this current range - pick it when the panel needs that remote or local diagnostic signal.