The J7KN18D0124 is a 3-pole contactor from the J7KN series, rated for 18 A AC switching current and 7.5 kW switching power at 690 V AC. The coil pulls in at 24 V AC, so it's a straight fit into a standard 24 V control transformer circuit common in panel builds. With 3 normally-open main contacts and one normally-closed auxiliary, it handles motor starting, resistive heating, or lighting contactor duty without needing an extra aux block for basic feedback.
Mounting and termination
Termination is screw-type, so no special tooling needed; strip and torque per the nameplate values.