Siemens SENTRON 3VA1063-4ED36-0BC0 — 63 A MCCB with 121 kA interrupting capacity
The Siemens SENTRON 3VA1063-4ED36-0BC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 63 A at 40 °C and an interrupting capacity of 121 kA at 240 V — that figure drops to 75.6 kA at 415 V and 52.5 kA at 440 V, so verify the available fault current at your service voltage before committing the BOM line. Thermal derating is minimal up to 50 °C (still 63 A), then drops to 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C — so for a panel running at 60 °C ambient you lose only 2 A of headroom.
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — fits standard panel-mount cutouts for 3-pole MCCBs in the 63 A frame class. The auxiliary switch design accommodates two HQ auxiliary switches, and the breaker ships with the basic switch 3VA10634ED360AA0 — verify the auxiliary contact configuration matches your control circuit wiring before panel integration.