63 A continuous, 242 kA interrupting — the selectivity anchor
The Siemens 3VA2063-6HL32-0DA0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Its interrupting capacity hits 242 kA at 240 V AC, 187 kA at 415 V AC, and still holds 121 kA at 500 V AC, making it a strong candidate for the main or feeder position in a high-fault panel where selectivity with downstream breakers is critical. This is a line-protection device (not motor-protective), designed for cable and busbar protection in distribution boards.
The breaker measures 181 mm high, 105 mm wide, and 86 mm deep. The 105 mm width is standard for a 3-pole MCCB in this class — it will occupy the same DIN-rail or mounting-plate footprint as other SENTRON 3VA2 frames of similar rating.
The 242 kA breaking capacity at 240 V is the headline number, but the 187 kA at 415 V is the one that governs most industrial panel applications in North America and Europe. The 63 A continuous rating is flat from 40 °C to 70 °C, which means no thermal derating in a warm enclosure — a practical advantage over breakers that lose ampacity above 40 °C.
Undervoltage release and auxiliary options
This is a factory-installed option on this order code, not a field-addable kit. The basic switch assembly is 3VA20636HL320AA0, which is the sealed sub-assembly that carries the contacts and arc chambers.