The 3VA4112-4ED34-0AA0: The headline interrupting ratings tell you where this breaker can safely clear a fault: 65 kA at 240 V AC, 25 kA at 480 V AC, and 14 kA at 600 Y/347 V AC. For a 125 A frame, those numbers give substantial SCCR headroom — you can place it downstream of a transformer or a high-capacity main without worrying about cascading failure during a bolted fault. The 690 V AC rated operating voltage confirms it handles line-to-line voltages common in 400/480 V industrial networks. The 29.1 W maximum power loss matters for enclosure heat calculations, especially in a multi-breaker lineup.
At 76.2 mm wide, 129.4 mm tall, and 75.1 mm deep, this MCCB fits standard 3-pole MCCB mounting footprints in SENTRON distribution boards and third-party enclosures.