The Siemens SENTRON 3VA2063-5HN32-0DA0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the full operating temperature range from -25 °C to 70 °C, with no derating needed up to 70 °C.
The 187 kA at 240 V is the headline number, but the real-world curve matters more: 121 kA at 415 V and 75.6 kA at 500 V, dropping to 3 kA at 690 V. If you're feeding a 600 V delta service, this breaker is within its insulation envelope.
The 3VA2063-5HN32-0DA0 measures 105 mm wide, 181 mm tall, and 86 mm deep — a standard 3-pole MCCB footprint that mounts on a DIN rail or direct panel. Power loss is 7.9 W maximum, which is manageable in a sealed enclosure but worth checking if you're packing six of these side-by-side at 40 °C ambient.