The AF12-30-01-11 is a 3-pole non-reversing contactor from ABB's AF12 series, carrying one normally-closed auxiliary contact. The coil accepts 24-60 VAC or 20-60 VDC — a wide-range control supply that simplifies panel wiring when you have mixed AC/DC control voltages on the same rail. Non-reversing means it switches a load in one direction only; if your motor needs forward/reverse, you'd pair two of these with mechanical interlocking.
Snap-on DIN rail mounting is standard for the AF12 frame. The 1NC auxiliary contact shares the same coil suppression as the main poles — verify free-wheel diode polarity if you're driving an inductive load downstream. The wide coil range (24-60 VAC / 20-60 VDC) means one part number covers both 24 V and 48 V control buses, reducing SKU count in the panel.