63 A MCCB with 242 kA at 240 V — what the ratings mean for your panel
The Siemens SENTRON 3VA2063-6HN32-0AE0 is a 3-pole molded case circuit breaker rated for 63 A continuous current at 40 °C through 70 °C with no derating across that span — the full 63 A holds at 70 °C ambient, which simplifies panel layout in hot enclosures or near other heat sources. Breaking capacity is 242 kA at 240 VAC and 187 kA at 415 VAC — these numbers mean the breaker can safely interrupt a fault current up to those levels without welding contacts or cascading an arc upstream, critical for high-fault installations like transformer secondaries or large motor control centers where available fault current is substantial. Rated insulation voltage is 800 V, so the breaker is rated for use in 480 V and 600 V class systems with adequate margin — the 690 V breaking capacity drops to 3 kA, which is a design limit for solidly grounded high-voltage industrial systems.
Line protection design with four auxiliary switches
This variant is configured for line protection (cable/feeder protection, not motor protection) and ships with four HQ auxiliary switches integrated — no separate add-on block needed for status feedback to a PLC or remote monitoring system. Physical footprint is 105 mm wide × 181 mm tall × 86 mm deep.
Active production — current lifecycle status
Maximum power loss is 5.4 W, which keeps heat dissipation low enough that no special ventilation is required in most panel layouts — thermal management is straightforward.