What it is and what it does
The ABB AF185-30-11-72 is a 3-pole, 250 amp, non-reversing across-the-line contactor with a 20-60V DC coil and one normally-open plus one normally-closed auxiliary contact. It's built for switching motor loads and resistive heaters in industrial control panels — the 250A rating in AC-3 duty (motor starting) means it handles full-load current for pumps, fans, and compressors up to that frame size. The wide DC coil range (20-60V) gives you flexibility on control voltage without swapping coils between different panel designs.