What this MCCB carries — and what that means in the panel
The Siemens 3VA2163-7HN42-0AA0 is a SENTRON molded case circuit breaker (MCCB) built for line protection, with a 63 A continuous rating that holds flat from 40 °C all the way up to 70 °C — no derating curve to chase when the enclosure runs hot. Four poles, ETU350 electronic trip unit. The 800 V rated insulation voltage gives headroom for 690 V systems where the interrupting rating drops to 3.7 kA — that's the zone where you need upstream coordination, not a bigger breaker. Breaking capacity hits 330 kA at 240 V, 242 kA at 415 V and 440 V, and 187 kA at 500 V. Those numbers mean this breaker swallows fault currents that would vaporize a standard industrial MCCB — sized for transformer secondaries or large bus feeds where the available fault current is high.
Fit in the enclosure — no surprises
Dimensions: 181 mm tall, 140 mm wide, 86 mm deep. That 140 mm width on a 4-pole frame is tight — fits standard distribution panel gutters without forcing the cable bend radius. IP40 on the front face; the rest of the breaker is open to the enclosure air for cooling. No undervoltage release, no communication module, no ground-fault monitoring — this is a bare line-protection breaker. If your BOM calls for shunt trip or remote signaling, the 3VA platform accepts plug-in accessories, but this order code ships without them.