140 A at 600 V – the load it handles
The A110-30-00-84: Rated 140 A continuous at 600 VAC – that's the IEC thermal current (Ith) for a contactor sized to switch motor loads up to roughly 75 kW at 400 V. The 120 VAC coil means the control circuit runs off a standard 120 V control transformer, not 24 VDC. Keep the coil voltage in mind when wiring the panel – a mismatch here means the contactor won't pull in.
DIN-rail fit and panel integration
The 140 A frame size takes up about three module widths (roughly 54 mm) – plan your enclosure fill accordingly. The power terminals accept up to 50 mm² cable; torque them to the manufacturer's spec to avoid hot spots at full load.