The LUCA1XFUTQ is a standard control unit in the TeSys U line — the brains of a modular motor starter that handles overload, short-circuit, and phase-failure protection for a 3-phase motor. At 0.25 kW rated for 400...440 V AC 50/60 Hz, it's sized for small pumps, fans, or conveyors where you want coordinated motor protection in one package.
Control voltage is 110...240 V AC or 110...220 V DC — common panel supplies, but note the DC range tops out at 220 V, not 240 V. The unit pulls 280 mA maximum while closing and drops to 35 mA sealed (AC) or 25 mA (DC with certain power bases), so the control transformer or DC supply needs headroom for that inrush. Tripping threshold is 14.2 x Ir +/- 20 %, meaning it clears a bolted fault fast — the Class 10 overload curve (per IEC 60947-6-2 and UL 508) gives you 10 seconds at 600% of the thermal setting, standard for standard-duty motor starts. IP20 on the front panel and wired terminals keeps fingers out; IP40 on the front face outside the connection zone is fine for a clean enclosure but not washdown.