It is rated 50 A continuous at 40 °C ambient and carries a maximum breaking capacity of 187 kA at 240 V AC, stepping down to 121 kA at 415 V, 76 kA at 440 V, and 17 kA at 500 V — the voltage on your distribution bus determines the interrupting rating that applies.
Above that it derates: 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C.
The 3VM1150-5MH32-0AA0 measures 130 mm high, 76.2 mm wide, and 70 mm deep. The TM120M release has an adjustable short-circuit pickup up to 800 A (li max.), and the breaker accepts an optional motor drive for remote operation.