What this MCCB rating means for the panel
The Siemens SENTRON 3VA2463-5HN32-0AE0 is a 3-pole molded case circuit breaker rated for 630 A continuous at 40 °C, with a maximum interrupting capacity of 187 kA at 240 V AC. That 187 kA figure is the SCCR — the fault current it can safely clear without exploding or welding contacts — so it's sized for high-fault panels where the available short-circuit current at the line side exceeds typical 65 kA or 100 kA breakers. The continuous rating derates with ambient temperature: 630 A at 40 °C drops to 520 A at 70 °C. If the panel ambient runs hot — say a sealed enclosure near a furnace line — size the load side for the derated figure, not the 630 A label.
Interrupting capacity across voltage bands
The breaker's SCCR drops as line voltage rises: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 9 kA at 690 V. At 690 V the 9 kA figure is modest — verify the available fault current at that voltage before committing the BOM line.
Physical fit and auxiliary configuration
Dimensions: 248 mm high, 138 mm wide, 110 mm deep. The 138 mm width is a standard 3-pole MCCB footprint — fits most SENTRON panel-mounting bases without adapters. Ships with 4 HQ auxiliary switches (form C) pre-installed; no undervoltage release or ground-fault module fitted. Operating temperature range -25 °C to 70 °C; storage from -40 °C to 80 °C. Max power loss 162 W at rated load — factor that into enclosure thermal calculations if the breaker is in a sealed cabinet with other heat sources.