What this MCCB carries and where it fits
The Siemens SENTRON 3VA2163-5JQ32-0HA0 is a 3-pole molded case circuit breaker rated for 63 A continuous at 40 °C through 70 °C — no derating needed across that band, which simplifies panel design in warm enclosures. Its interrupting capacity hits 187 kA at 240 V and 121 kA at 415 V, so it handles high-fault service-entrance or distribution positions without cascading upstream. At 690 V the rating drops to 3.7 kA, which still covers most motor-circuit faults on 690 V drives. The breaker is designed for line protection and includes a shunt trip release (STL) for remote tripping and a communication function for integration into a monitored distribution system.
Panel fit and integration
The breaker measures 105 mm wide, 181 mm tall, and 86 mm deep — a standard SENTRON 3VA frame that drops into the same DIN-rail or screw-mount footprint as other 3VA3 breakers. The 3-pole block occupies three modular 18 mm units on the rail. Maximum power loss is 4 W, so heat buildup in a sealed panel is minimal. Operating range spans -25 °C to 70 °C; storage range is -40 °C to 80 °C.
What the interrupting ratings mean for your fault level
The 187 kA at 240 V and 121 kA at 415 V are the maximum fault currents this breaker can safely interrupt at those voltages. At 500 V the rating is 75.6 kA; at 690 V it is 3.7 kA. If your service-entrance available fault current exceeds these numbers, you need a current-limiting upstream device or a higher-rated frame. The 63 A continuous rating is flat from 40 °C to 70 °C — no thermal derating curve to calculate.