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. It's built for line protection, meaning it sits at the feeder or branch to protect cables and buswork, not motor or generator circuits. The interrupting ratings climb to 187 kA at 240 V and 121 kA at 415 V, so it handles high-fault utility feeds without cascading upstream. A shunt trip (STL) and two HQ auxiliary switches are integrated, giving you remote trip capability and status feedback without adding external blocks.
Panel fit — 105 mm wide, 86 mm deep, 181 mm tall
At 105 mm wide, 86 mm deep, and 181 mm tall, this MCCB fits the standard SENTRON 3VA2063 footprint. It mounts on a DIN rail or directly to a backplate via the integral lugs. The 86 mm depth leaves room behind a 200 mm deep enclosure for wiring bends and gland clearance. The 3-pole block occupies three 18 mm module positions on the rail — plan your fill factor accordingly.
Breaking capacity — where it matters
The 187 kA at 240 V is the headline number, but the 121 kA at 415 V is what drives most industrial panel designs. 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. For a 480 V panel with a 65 kA SCCR target, this breaker gives you headroom without a current-limiting fuse ahead of it. The minimum breaking capacity is 95 A, so it clears low-level faults cleanly.