This is the drawout version, meaning the breaker mechanism slides into a fixed cradle — a standard configuration for main switchboards where quick replacement or isolation during maintenance is needed without unbolting busbars.
Above 40 °C, standard IEC 60947-2 derating curves apply. The N breaking capacity code typically corresponds to a specific short-circuit breaking level (often around 65 kA at 415 VAC for this family), which governs selectivity with downstream devices. The drawout cradle (445 mm deep × 400 mm wide × 440 mm high) requires a cutout and racking mechanism in the switchgear panel — not a bolt-on fixed mount.