The Siemens SENTRON 3VA2163-5JP32-0AE0 is a 3-pole 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 in a warm panel. It's designed for line protection and carries a communication function, so it can talk to a higher-level controller or BMS over the integrated bus. Breaking capacity sits at 187 kA at 240 V AC, dropping to 121 kA at 415 V and 440 V, then 75.6 kA at 500 V, and 3.7 kA at 690 V.
Fit and footprint
That's unusual for a compact MCCB; many competitors start derating above 40 °C. The adjustable thermal-magnetic trip range is 95 A minimum to 756 A maximum, so this frame covers a wide band of cable and load protection with one physical unit. Power loss is 4 W maximum — negligible for panel heat budget.
