The Siemens 3VA2163-7MN36-0DA0 is a SENTRON molded case circuit breaker (MCCB) built for motor protection duty. Rated 63 A continuous across the full 40 °C to 70 °C ambient range — no derating needed as the panel warms up, which simplifies panel layout when grouping breakers. The 3-pole frame carries a 330 kA interrupting capacity at 240 V, dropping to 242 kA at 415 V and 187 kA at 500 V; at 690 V it still holds 3.7 kA. That high-end short-circuit rating means it can be applied upstream near a large transformer without needing a current-limiting fuse ahead of it — useful for a main feeder or a motor control center incoming.
What the key ratings mean for fit
The 63 A rating holds flat through 70 °C — no thermal derating curve to calculate. For a panel builder, it means you can pack this breaker next to other heat sources and still count on the full 63 A without oversizing the frame. The interrupting ratings climb to 330 kA at 240 V. That is high for a 63 A frame — it tells you the internal arc chamber and contact geometry are built for severe fault duty, likely a stored-energy mechanism. In practice, it gives selectivity headroom downstream; you can coordinate with smaller branch breakers and still clear a bolted fault at the bus without the main tripping. Built-in phase failure detection and an undervoltage release (UVR) as the auxiliary release type mean this breaker can drop the load automatically on a lost phase or a sagging control voltage. For motor protection, that prevents single-phasing damage — a common failure mode on screw compressors and conveyors.
Panel integration and mounting
Dimensions are 86 mm deep, 105 mm wide, 181 mm tall — a standard 3-pole MCCB footprint that fits Siemens SENTRON 3VA2 distribution blocks and busbar systems. The 105 mm width matches the typical 3-pole modular spacing on DIN-rail or panel-mount adapters. No trip indicator and no voltage trigger; the undervoltage release is the only auxiliary release fitted. Power loss is 6.5 W maximum — negligible for thermal budgeting inside a steel enclosure, but worth noting if the panel is tightly sealed with no forced ventilation.