Its interrupting capacity reaches 330 kA at 240 V AC, stepping down to 242 kA at 415 V and 440 V, then 187 kA at 500 V, and 5.25 kA at 690 V — the voltage-dependent curve is typical for current-limiting MCCBs and governs where this breaker can be placed in the fault-current hierarchy.
The 63 A rating holds flat from 40 °C through 50 °C ambient, then derates linearly to 53.55 A at 70 °C. That means in a warm panel (55 °C+) you lose roughly 4–15 % of headroom — plan the load accordingly if the breaker sits near other heat sources. The ETU350 trip unit is electronic, not thermal-magnetic, so it offers better precision and adjustable long-time, short-time, and instantaneous pickup thresholds. That covers remote status indication and undervoltage shutdown without needing an external relay.
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — a standard 3-pole MCCB footprint that fits SENTRON 3VA2 mounting accessories and busbar systems. The 86 mm depth includes the arc-chamber housing; verify gland-plate clearance if the panel is shallow.