What the 630 A / 242 kA ratings mean for fit
The Siemens SENTRON 3VA2463-6KQ32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated 630 A at 40 °C ambient — that's the continuous current it carries without tripping in a 40 °C panel. Above that temperature the rating steps down: 600 A at 45 °C, 570 A at 50 °C, 540 A at 55 °C, 510 A at 60 °C, 480 A at 65 °C, and 450 A at 70 °C. Breaking capacity hits 242 kA at 240 V AC, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V.
Trip unit, communication, and protection features
Fitted with the ETU860 electronic overcurrent release — programmable LSIG protection (long-time, short-time, instantaneous, ground fault). The ground-fault monitoring uses summation-current formation on the L-conductor, and N-conductor protection is adjustable from OFF to 20 %–160 %. Communication function is built in, plus an 'Other Measurement Function' capability for power monitoring. No undervoltage release and no voltage trigger on this variant.
That's a 3-pole MCCB footprint for a 630 A frame — expect a screw-clamp or bolted connection, not a plug-in base. Panel layout needs clearance for the ETU interface and communication wiring on the front face.