The Schneider Electric TeSys B CV1BL1L0ZM511 is a single-pole contactor rated for 1000 A at 690 V AC in AC-3 duty, meaning it handles the high inrush of motor starting currents for heavy loads — think large pumps, compressors, or conveyors in a 690 V distribution. The 220 V AC 50 Hz coil is standard for European panel voltages; verify your control transformer matches before wiring.
AC-1 covers heating and lighting circuits. The 1 NO main pole carries the full 1000 A; the auxiliary contact block gives you 1 NO + 1 NC for feedback or interlocking.