What this MCCB carries
The Siemens SENTRON 3VA2163-6HN36-0AJ0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating curve to chase. Interrupting capacity hits 242 kA at 240 V AC, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3.7 kA at 690 V. That 242 kA at 240 V tells you it's built for high-fault panels where a standard MCCB would weld closed. Line protection design means it's tuned for feeder and distribution duty, not motor-starting curves.
Fit and footprint
Dimensions are 105 mm wide, 181 mm tall, 86 mm deep — a standard SENTRON 3VA2 frame that drops into existing panel cutouts and busbar arrangements without re-drilling. The 86 mm depth leaves room behind the gland plate for cable bends. Operating temperature range is -25 °C to 70 °C; storage from -40 °C to 80 °C. Power loss maxes out at 4 W, so ventilation requirements are minimal even in a sealed enclosure.
Switching and signaling
Comes with 2 auxiliary switches plus 1 trip alarm switch (HP type) built in — gives you remote status on open/closed and fault-trip without adding a separate accessory. Trip indicator is present on the front face, so a walk-by tells you whether it's a manual open or a fault. No undervoltage release, no communication module, no ground-fault monitoring on this variant — it's a straight line-protection breaker with basic signaling.