What this MCCB is and what it handles
The SENTRON 3VA2463-8KQ32-0AA0 is a 3-pole molded case circuit breaker rated for 630 A continuous current at 40 °C, with a full-scale trip setting of 630 A and an initial trip value of 126 A. It's designed for line protection in industrial distribution panels, and it carries a communication function for integration with monitoring systems. Breaking capacity is 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V. That means it can safely interrupt fault currents up to those levels without cascading upstream — critical for high-fault installations like transformer secondaries or large motor control centers.
Thermal derating and real-world fit
The 630 A rating is at 40 °C ambient. At 45 °C it's 600 A, at 50 °C it's 570 A, at 55 °C it's 540 A, at 60 °C it's 510 A, at 65 °C it's 480 A, and at 70 °C it's 450 A. If your panel runs hot — say near a drive lineup or in a non-conditioned room — you need to size up or derate accordingly. The maximum power loss is 162 W, so ventilation matters. Dimensions are 248 mm high, 138 mm wide, 110 mm deep. That's a standard MCCB footprint for this current class; it'll bolt into a SENTRON panelboard or a standalone enclosure without surprises. The 800 V rated insulation voltage covers most 480 V and 600 V systems with margin.
Protection features and monitoring
Ground-fault monitoring is implemented via summation current formation on the L-conductor. The breaker also includes an 'other measurement function' and communication capability.