The Siemens SENTRON 3VA2063-8HM36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current with an insulation voltage of 800 V. It's designed for line protection — the workhorse branch-circuit breaker in a distribution panel, not a motor-protective device. The 63 A rating holds flat across the full ambient range from 40 °C to 70 °C, so no derating curve to chase when the panel runs hot.
Breaking capacity and selectivity
Breaking capacity is the headline number that decides whether this breaker clears a fault or welds shut. At 240 V it interrupts 440 kA; at 415 V and 440 V it holds 330 kA; at 500 V it's 220 kA; at 690 V it drops to 52.5 kA. That's a high-interrupting-capacity (HIC) device — sized for main or large feeder duty where fault current is stiff. The 63 A continuous rating paired with that interrupt capacity means it's built for a high-fault point in the distribution tree, not a downstream subfeed.
Physical fit and integration
Dimensions: 105 mm wide, 181 mm tall, 86 mm deep. That's a standard SENTRON 3VA2 frame footprint — mounts on a DIN rail or panel-mount baseplate in the distribution cabinet. The 3-pole block occupies three modular-width positions. The depth of 86 mm means it clears most standard enclosure back-panels without a sub-panel spacer.
Ground-fault monitoring variant
This variant includes a summation-current ground-fault monitoring function on the L-conductor. That means it can detect residual current by summing the phase currents through a single core-balance transformer — useful for equipment ground-fault protection without an external GFCI module. No undervoltage release, no communication function, no trip indicator on this order code.