What this MCCB carries on the nameplate
The Siemens SENTRON 3VA2463-5JQ32-0HC0 is a 3-pole molded case circuit breaker rated for line protection, with a full-scale current of 630 A and an adjustable thermal-magnetic trip range from 945 A minimum to 5 670 A maximum. At 240 V it interrupts faults up to 187 kA; at 415 V and 440 V that figure holds at 121 kA, dropping to 75.6 kA at 500 V and 9 kA at 690 V. The breaker includes a shunt trip release (STL) and two auxiliary switches HQ, plus a communication function for integration into a monitored distribution system. Power loss at full load is 162 W maximum.
Current derating — the real-world rating
The 630 A rating applies at 40 °C ambient. At 45 °C the breaker carries 600 A; at 50 °C, 570 A; at 55 °C, 540 A; at 60 °C, 510 A; at 65 °C, 480 A; and at 70 °C, 450 A. If the panel ambient runs above 40 °C, the continuous load must be sized to the derated figure, not the nameplate 630 A. Operating ambient range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.
Physical fit and auxiliary complement
Dimensions are 248 mm high, 138 mm wide, 110 mm deep. The 3-pole frame occupies standard MCCB panel space; verify bus-bar centers and mounting footprint against the existing cutout. The breaker ships with a shunt trip (STL) for remote tripping and two auxiliary switches HQ for status feedback. The base switch variant is 3VA2463-5JQ32-0AA0; this order code adds the communication function and the auxiliary release.