630 A MCCB with high interrupting capacity
The Siemens SENTRON 3VA2463-5HN32-0BH0 is a 3-pole molded case circuit breaker rated for 630 A continuous current at 40 °C, with a maximum breaking capacity of 187 kA at 240 V AC. That interrupting rating drops to 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 9 kA at 690 V — so the application voltage determines the available fault current the breaker can clear. The thermal derating curve is published per the evidence: at 45 °C the continuous rating is 612 A, at 50 °C it is 593 A, and at 70 °C it is 520 A. This matters for panel builders who need to maintain selectivity without upsizing the frame.
Line protection with integrated undervoltage release
This MCCB is configured for line protection — meaning it protects cables and busbars from overloads and short circuits, not motor or generator circuits. It includes an undervoltage release (UVR) that trips the breaker when the supply voltage drops below a set threshold, which is useful for preventing automatic restart after a brownout. The auxiliary switch configuration is 2 auxiliary switches plus 1 trip alarm switch (HQ), giving status feedback for PLC or SCADA inputs. The breaker measures 138 mm wide, 248 mm high, and 110 mm deep — a standard SENTRON 3VA frame that fits most DIN-rail or panel-mount enclosures without special adapters.