The Siemens SENTRON 3VA2163-6HL36-0JC0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current at 40 °C, designed for line protection in distribution panels. Its interrupting capacity hits 242 kA at 240 V and 187 kA at 415 V — that means it can safely clear a fault up to those levels without the arc flashing over or taking out upstream gear. The 63 A rating holds flat across the full 40–70 °C ambient range, so no derating headache in a warm enclosure.
At 415 V and 440 V it still handles 187 kA, and at 500 V it's 121 kA. The drop to 3.7 kA at 690 V tells you this is a 240–500 V class breaker — don't spec it for a 690 V distribution bus unless your fault current is under that threshold. For a typical 480 V industrial panel with a transformer-fed bus, 121 kA is plenty of headroom.
The breaker measures 105 mm wide, 181 mm tall, and 86 mm deep. The 3-pole body takes up about 4 inches of rail space.