The Siemens SENTRON 3VA2163-6HL36-0JA0 is a 3-pole molded case circuit breaker rated for 63 A continuous current (Iu) in a line protection configuration. The breaker is dimensioned at 105 mm wide, 181 mm tall, and 86 mm deep, fitting standard SENTRON panel cutouts and busbar systems.
This MCCB delivers 242 kA at 240 V, 187 kA at both 415 V and 440 V, 121 kA at 500 V, and 5 kA at 690 V. For a 63 A frame, 242 kA at 240 V is exceptionally high, which means you can place this breaker close to a large transformer or generator bus without worrying about the fault current exceeding its rating. At 690 V the capacity drops to 5 kA, so if you're on a 690 V line, verify that the prospective fault current stays under that threshold or coordinate with an upstream current-limiting device.
The breaker holds full 63 A rating from 40 °C up to 50 °C ambient. At 55 °C it derates to 60.6 A, at 60 °C to 58.3 A, at 65 °C to 55.9 A, and at 70 °C to 53.6 A. Operating ambient range is -25 °C to 70 °C, storage range -40 °C to 80 °C. Maximum power loss is 4 W.