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. That 330 kA figure at 240 V means it can interrupt fault currents at the main distribution level where available fault current is highest, without needing an upstream current-limiting fuse. The 800 V rated insulation voltage gives headroom for 480 V and 600 V class systems. 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.
Panel fit and mounting
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. Operating temperature range is -25 °C to 70 °C; storage range extends from -40 °C to 80 °C. Maximum power loss is 4 W, which keeps heat dissipation manageable in enclosed panels.