The J7KN18D1024D is a 3-pole power contactor with a 24 VDC coil, rated for 18 A switching current and 7.5 kW at 400 V AC. The main contact configuration is 3NO, with an integrated 1NO auxiliary contact.
The 18 A AC-3 rating (switching motor loads) and 7.5 kW at 400 V define the motor it can handle — typically a 15 HP three-phase induction motor at 400 V. The 24 VDC coil is standard for PLC-driven panels; verify the control transformer and fuse sizing for inrush. The 3NO main contacts suit three-phase motor circuits, and the built-in 1NO auxiliary gives a feedback signal or interlock without adding a side-mount block.