What it is and what it does
The Siemens SENTRON 3VA2163-5HN32-0BH0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection. It carries a continuous current of 63 A at 40 °C through 70 °C without derating — the full 63 A holds across the entire operating temperature range. The maximum current rating is 756 A. Breaking capacity is 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. The unit includes an undervoltage release (UVR) and is equipped with 2 auxiliary switches plus 1 trip alarm switch (HQ design). It has a trip indicator and no voltage trigger or communication function.
What the ratings mean for fit
The 63 A continuous rating is flat from 40 °C to 70 °C — no derating needed as ambient climbs, which simplifies panel thermal budgeting. The 187 kA interrupting rating at 240 V means this breaker can safely clear a fault of that magnitude without upstream protection coordination issues; at 415 V it still handles 121 kA, covering most industrial distribution scenarios. The 756 A maximum rating is the short-time withstand (Icw) or instantaneous trip threshold — it's not a load current; don't size it as such. The undervoltage release (UVR) is built in (not field-installed), so if your BOM calls for a UVR-equipped MCCB, this is ready to drop in without an add-on module.
Panel integration and mounting
Dimensions: 105 mm wide, 181 mm high, 86 mm deep. This is a standard SENTRON 3VA frame size — it mounts on a DIN rail or can be screw-fixed to a backplate. The 86 mm depth is the body only; allow clearance for cable entry and the UVR wiring. The auxiliary switch block (2 aux + 1 trip alarm) adds depth on the left side; factor that into gland-plate layout. No communication module on this variant — it's a standalone breaker, not a networked unit.