63 A MCCB with serious interrupting capacity — what you're looking at
The Siemens 3VA2063-5HL32-0KC0 is a 3-pole SENTRON molded case circuit breaker rated for 63 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed in a warm enclosure. A shunt trip (STL) and two HQ auxiliary switches are integrated, giving you remote trip capability and status feedback without adding external blocks.
The 3-pole block occupies three 18 mm module positions on the rail — plan your fill factor accordingly.
Breaking capacity — where it matters
At 500 V it still holds 75.6 kA, and at 690 V it drops to 3 kA — that's the limit for 690 V line-side faults. The minimum breaking capacity is 95 A, so it clears low-level faults cleanly.
