It carries a continuous current of 160 A at 40 °C, holds that rating through 50 °C, then derates to 144 A at 70 °C. The interrupting capacity is the headline number: 187 kA at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V.
The 160 A frame with a TM220 thermal-magnetic release means the thermal element responds to sustained overloads (inverse-time curve), while the magnetic instantaneous trip handles short-circuits. Three poles, no undervoltage release, no shunt trip, no communication module — this is a straight thermal-magnetic breaker, not a power-management device. The IP40 front protection means it's suitable for dry indoor panels; no washdown rating. Two built-in HQ auxiliary switches (form C) give you status feedback for PLC or pilot-light indication without adding a separate accessory block.
That 76.2 mm width (3-inch pitch) is the standard for 3-pole MCCBs in North American panelboards — it drops into a 3-pole mounting cradle without adapters. The 70 mm depth means it fits flush in most 200 mm-deep enclosures with room for rear bus connections. Panel builders: the 160 A rating at 50 °C means you can load it to 160 A in a 50 °C ambient without derating; above that, use the derating curve down to 144 A at 70 °C.