The Siemens 3VA2463-7HN32-0CC0 is a SENTRON molded case circuit breaker (MCCB) for line protection, rated for a continuous current Iu of 630 A at 40 °C. It carries a 330 kA breaking capacity at 240 V, stepping down to 242 kA at 415 V and 440 V, 187 kA at 500 V, and 52.5 kA at 690 V — the full fault-interruption curve for a high-capacity distribution main. The 630 A rating at 40 °C derates with ambient temperature: 612 A at 45 °C, 593 A at 50 °C, 575 A at 55 °C, 557 A at 60 °C, 538 A at 65 °C, 520 A at 70 °C. If the panel ambient runs above 40 °C, use the derated figure for sizing — the 630 A is the base, not the ceiling. This MCCB uses an ETU350 electronic trip unit. It includes an undervoltage release (UVR) and two HQ auxiliary switches. The basic switch assembly is order code 3VA2463-7HN32-0AA0; the integrated auxiliary trip is 3VA9608-0BB24.
Panel integration
The breaker measures 138 mm wide, 248 mm high, and 110 mm deep — a standard SENTRON 3VA2 frame footprint for 630 A class. Mounts on a DIN rail or direct panel; the 3-pole body with UVR and auxiliary switches fits a typical distribution section without extra side clearance.
Operating conditions
Rated insulation voltage Ui is 800 V. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 164.5 W — account for heat dissipation in the enclosure sizing. Mechanical endurance is 15,000 operations. No communication function, phase failure detection, or ground fault monitoring is built in — the ETU350 handles overcurrent protection only.