What this contactor does in the panel
The J7KNA0901230 is a 3-pole miniature contactor rated for 9 A switching current at 400 V AC, with a 230 V AC coil. The 3NO main contact set handles motor or resistive loads up to 4 kW (roughly 5 HP), and the built-in 1NC auxiliary contact provides a feedback or interlock signal without an extra add-on block. Screw terminals and a DIN-rail snap-on foot mean it integrates into a standard control panel without special tooling — strip the wire, torque to spec, clip onto the rail. The 230 V AC coil is common across European and North American control circuits where line-to-neutral or phase-to-phase 230 V is available.