The TeSys CV1BH3H0ZM532 is a 3-pole contactor from the TeSys B range, rated for 300 A in AC-3 duty at 690 V AC. That AC-3 rating means it's sized for switching squirrel-cage motors — the 300 A figure governs the motor full-load current it can handle across starting and running. The AC-1 rating covers resistive loads like heating banks or lighting circuits at the same current level. The coil is 220 V AC at 50 Hz, so it pulls in on a standard European control voltage. Auxiliary contacts come built in: 3 NO plus 2 NC, which is enough for a holding circuit and a status feedback pair without adding a side-mount block.
At 300 A AC-3, it's a frame size that needs some breathing room for heat dissipation — plan for at least 50 mm clearance above and below if you're stacking contactors in a motor control center. The 3 NO + 2 NC auxiliary set is wired on the front face, accessible without removing the main power wiring.