The Siemens 5SN6332-7CP is a 3-pole miniature circuit breaker from the SENTRON 5SN family, rated 400 V AC at 50 Hz.
Breaking capacity — what the two ratings mean
EN 60898 is the residential standard; 6 kA there covers most domestic sub-distribution boards. IEC 60947-2 is the industrial standard; 15 kA there means this breaker can interrupt a fault on a 400 V industrial supply with a transformer rating up to about 1 MVA (assuming 5% impedance) without welding its contacts. The higher 15 kA rating is the one to check for selectivity with upstream devices in a plant panel.
Solid conductors up to 35 mm² fit the terminals — enough for a 40 A feed on a 3-phase subfeed. The 76 mm depth (70 mm installation depth) means it sits flush in a standard 100 mm enclosure without forcing the cover.