The Siemens 3VA2463-5HL32-0JC0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) rated for line protection in 3-pole configuration. It carries a rated continuous current Iu of 630 A and delivers 187 kA interrupting capacity at 240 V, 121 kA at 415 V, and 75.6 kA at 500 V — numbers that define the fault-clearing headroom for a main or feeder breaker in an LV distribution board. The overcurrent release is an ETU320 electronic trip unit, and the auxiliary release is a shunt trip (STL). Two HQ auxiliary switches come fitted as standard. The breaker's thermal derating curve runs from 630 A at 40 °C down to 520 A at 70 °C, so panel ambient temperature directly governs the continuous load it can carry.
Ratings and what they mean for the panel
The 187 kA at 240 V and 121 kA at 415 V are the short-circuit breaking capacities (Icu) — the maximum fault current the MCCB can safely interrupt at those voltages. For a 630 A frame, these figures place it well above typical utility fault levels at the service entrance, so selectivity with downstream breakers is achievable without exceeding the breaker's capability. Rated insulation voltage Ui is 800 V, which covers 690 V systems with margin. The 162 W maximum power loss at rated current matters for enclosure thermal design — if the panel is sealed or densely packed, that heat needs to be vented or the breaker must be derated further. Mechanical endurance is listed at 15 000 cycles — not a daily-switching device, but fine for infrequent manual isolation or backup protection where the breaker stays closed most of its life.
Physical fit and panel integration
The breaker measures 248 mm high by 138 mm wide by 110 mm deep. That 138 mm width is the 3-pole frame footprint — check the existing busbar or cable lug spacing before committing the gland plate layout. The depth of 110 mm includes the arc chamber and terminal area, so allow clearance for outgoing cable bends. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The -25 °C lower limit means it can sit in an unheated electrical room in cold climates, but the 70 °C upper operating limit is the one to watch for derating.