It carries a 3-pole design with an ETU330 electronic overcurrent release, meaning the trip curve is adjustable and more precise than a thermal-magnetic unit. The interrupting ratings are what you'd expect from a serious feeder breaker: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V.
Footprint is 138 mm wide by 248 mm tall by 110 mm deep — that's about 5.43 by 9.76 by 4.33 inches. It's a standard MCCB form factor for a 400 A frame; you're not going to have trouble finding space on a DIN rail or in a panel cutout, but verify the mounting pattern against your existing busbar or lug kit.