The Siemens SENTRON 3VA1163-6EF32-0JH0 is a 3-pole molded case circuit breaker rated for line protection, carrying 63 A continuously from 40 °C up to 50 °C before any derating kicks in — at 55 °C it still holds 62 A, and at 70 °C it's good for 58 A. That thermal curve means you can pack it into a warm enclosure without losing headroom, as long as you stay under 70 °C operating ambient. Breaking capacity is the headline here: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and still 17 kA up to 690 V.
Width is 76.2 mm (3 inches on the DIN rail), depth 70 mm, height 130 mm.