The 3RV2032-4TA10 delivers 100 kA at 240 V, 50 kA at 400 V, 10 kA at 500 V, and 5 kA at 690 V. At 480 V it's rated 17 A continuous. For a 400 V panel with a 50 kA available fault current, this breaker sits comfortably within the SCCR headroom. No back-up fuse is required at 240 V; at 400 V the maximum back-up fuse is 100 A, at 500 V it's 80 A, and at 690 V it's 63 A. That tells the panel builder what upstream protection is needed to keep the breaker's rating valid.
Mounting and wiring — panel integration notes
Mounts in any position. Screw-type terminals on the main circuit accept 2× 1–35 mm² or 1× 1–50 mm² solid or stranded copper. The M6 main contact bolts are sized for the full rated current. The 55 mm width means six of these fit in a 380 mm wide panel section with a bit of breathing space.