The Siemens SENTRON 3VA1120-3EF32-0CA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a 20 A continuous current at 40 °C and a 75.6 kA interrupting capacity at 240 VAC.
The interrupting curve drops from 75.6 kA at 240 V to 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at 500 V and 690 V. That 11.9 kA floor at 690 V is the figure to check for 480/600 V class panels — it confirms the breaker can clear a bolted fault on a 600 V motor branch without upstream coordination failure, provided the available fault current stays under that threshold.
Rated current holds at 20 A from 40 °C through 55 °C, then derates to 19 A at 60 °C and 19 A at 70 °C. In a sealed enclosure without forced cooling, that 1 A drop at 60 °C is the practical limit — the breaker won't nuisance-trip on a 19 A load in a hot panel.