What this MCCB is and what it does
The Siemens 3VA2063-5HN32-0HL0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in industrial distribution panels. It carries a continuous current rating of 63 A across the full ambient temperature range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel thermal budgeting. The 3-pole construction and interrupting ratings of 187 kA at 240 V and 121 kA at 415 V mean it can clear high-fault currents on a 480 V or 400 V service without cascading upstream. That 187 kA figure at 240 V is the class's highest tier for this frame size — you spec it when the available fault current at the panelboard is known to be high.
Panel fit and auxiliary wiring
The breaker occupies 105 mm width, 181 mm height, and 86 mm depth — a standard SENTRON 3VA2 frame footprint that drops into existing DIN-rail or screw-mount panel layouts without re-drilling. It ships with a factory-installed auxiliary switch block: 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch (HQ type), plus a shunt trip (STL) release for remote tripping. The basic switch inside is order code 3VA20635HN320AA0, so if you need a replacement subassembly that's the part to cross-reference.