What the 15 kA Icu means for your panel
Its 15 kA Icu (ultimate breaking capacity) at 230/400 V AC means it can safely interrupt a fault current up to 15,000 A without welding its contacts or cascading the fault upstream — that's the figure that governs selectivity coordination in a distribution board.
Snap-on DIN rail mount, 1 module width (18 mm). The 15 kA Icu rating holds without requiring a separate current-limiting backup fuse in most 230/400 V distribution panels — check your upstream device's let-through energy (I²t) for full selectivity. Terminal capacity accepts up to 25 mm² conductor; torque to 2.5 Nm.