The Schneider Electric ENW33109 is a rear connection accessory for the EasyPact NW range of air circuit breakers. It's a 3-pole fixed-mount assembly rated for 630 to 1250 A, designed to bolt onto the top of the breaker frame and bring the power connections out the back of the panel.
The 630-1250 A current range covers the full EasyPact NW frame sizes — you're not picking between a 630 A and a 1250 A variant; the same ENW33109 accepts the full range, so it fits any NW breaker in that class. The 70 mm connection pitch matches the standard NW bus-bar spacing, so the vertical or horizontal bus runs line up without adapters. Fixed mounting means this is a panel-bolt-on accessory, not a plug-in or draw-out module. The rear connection position (top of the breaker, rear of the panel) routes the main power cables out the backplane, which keeps the front of the cabinet clear for control wiring and operator access.