63 A MCCB with ETU350 — line protection for high-fault panels
Breaking capacity is the headline number here: 330 kA at 240 V, 242 kA at 415/440 V, 187 kA at 500 V, and 3.7 kA at 690 V. At 690 V the capacity drops sharply to 3.7 kA, which is typical for a 63 A frame at that voltage; this breaker is not the right choice for a 690 V main if fault current exceeds 3.7 kA.
Dimensions are 140 mm wide, 181 mm high, 86 mm deep — a standard 4-pole MCCB footprint for the SENTRON 3VA platform. Power loss is 4 W maximum at rated current. That is low enough that thermal rise in a multi-breaker lineup is manageable, but in a densely packed panel with 10+ breakers, the cumulative heat still needs ventilation planning.