Motor protection circuit breaker for panel integration
At 240 V the interrupting rating is 100 kA; at 400 V it drops to 25 kA; at 690 V it holds at 2 kA. The gL/gG fuse backup ratings at 400 V (63 A), 500 V (50 A), and 690 V (50 A) tell you the maximum upstream fuse that still allows the breaker to coordinate — exceeding these means the fuse may not clear before the breaker's internal contacts weld.
DIN rail fit and terminal sizing
Width 45 mm, depth 97 mm, height 97 mm. That's tight for a motor-protection device; verify that the cable bend radius and terminal access don't require more than the stated forwards clearance. Main-circuit terminals accept 2×(1…2.5 mm²) or 2×(2.5…10 mm²) solid or stranded copper, M4 screw terminals. That covers standard motor cable sizes up to 10 mm² — enough for a 15 hp motor at 460/480 V.