The Siemens SENTRON 3VA2063-5HN32-0DA0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the full operating temperature range from -25 °C to 70 °C, with no derating needed up to 70 °C. It carries a 187 kA interrupting capacity at 240 V and 121 kA at 415 V, sized for high-fault installations where you need selectivity without cascading upstream. The built-in undervoltage release (UVR) lets you drop the breaker on loss of control voltage — standard for safety circuits or emergency-off strings in panel builds.
Interrupting capacity and what it means for your panel
The 187 kA at 240 V is the headline number, but the real-world curve matters more: 121 kA at 415 V and 75.6 kA at 500 V, dropping to 3 kA at 690 V. That tells you this breaker is built for 240–480 V distribution where fault currents run high — common in industrial MCC lineups and transformer secondaries. The 800 V rated insulation voltage backs the 690 V rating, so it's legal on 600 V class systems too. Rated insulation voltage of 800 V means the internal clearances and creepage are designed for 690 V phase-to-phase systems, not just 480 V. If you're feeding a 600 V delta service, this breaker is within its insulation envelope.
Physical fit and integration
The 3VA2063-5HN32-0DA0 measures 105 mm wide, 181 mm tall, and 86 mm deep — a standard 3-pole MCCB footprint that mounts on a DIN rail or direct panel. The 105 mm width is the critical dimension for multi-breaker lineups; it's the same as other SENTRON 3VA frames, so you can swap without re-drilling the backplate. Power loss is 7.9 W maximum, which is manageable in a sealed enclosure but worth checking if you're packing six of these side-by-side at 40 °C ambient.