What this MCCB does on your line
The Siemens SENTRON 3VA2163-7JQ36-0AA0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Its breaking capacity hits 330 kA at 240 VAC and stays at 242 kA through 440 VAC, then drops to 187 kA at 500 V and 3.7 kA at 690 V. This is a line-protection design — optimized for feeder and distribution circuits rather than motor protection. It includes a communication function for remote monitoring and trip indication, though the base unit has no local trip indicator.
Dimensions are 181 mm high, 105 mm wide, 86 mm deep — a standard 3-pole MCCB footprint that fits SENTRON 3VA mounting plates and distribution panels. Maximum power loss is 4 W, which keeps heat dissipation manageable in enclosed panels.