What the ratings mean for fit
The Siemens SENTRON 3VA2163-5KQ36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated 63 A continuous current, designed for line protection in distribution panels. Its breaking capacity is 187 kA at 240 V AC, 121 kA at 415/440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V — the voltage on your bus determines which figure governs your SCCR coordination study. The 63 A rating holds flat across the entire 40 °C to 70 °C ambient range (–), so no derating is needed in a warm enclosure. The breaker includes a communication function and summation-current ground-fault monitoring on the L-conductor, which means it can report status and detect ground faults without a separate module — useful for coordinated protection schemes in industrial panels.
Panel integration and mounting
Dimensions are 181 mm height, 105 mm width, 86 mm depth. The 105 mm width is standard for a 3-pole MCCB footprint — it fits existing SENTRON panel cutouts and busbar arrangements without re-drilling. Operating temperature range is -25 °C to 70 °C; storage from -40 °C to 80 °C. Maximum power loss is 4 W, negligible for thermal budgeting in a sealed enclosure.