The Siemens SENTRON 3VA2163-5MN36-0JH0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous, with a flat derating curve from 40 °C through 70 °C — no current reduction needed across that range. That's unusual for a motor-protection breaker; most MCCBs start derating above 40 °C. Here it means the 63 A rating holds even in a hot panel or enclosure with limited airflow, so you don't have to oversize the frame for ambient temperature headroom.
Interrupting capacity hits 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. At the common 415 V industrial bus, 121 kA gives serious fault-current headroom for high-capacity transformer secondaries or large motor banks. The steep drop at 690 V (3.7 kA) means this frame is not intended for 690 V distribution — if your line runs 690 V, you need a higher-voltage-rated MCCB frame.
Motor protection design and auxiliary configuration
Designed specifically for motor protection, with phase failure detection built in. That means it will trip on loss of a phase — critical for preventing single-phasing damage on a motor load.