400 A MCCB with a 4800 A frame — what that means on the line
That frame rating means the internal bus and arc chambers are sized for fault currents up to 4800 A, so the breaker handles high-fault-duty panels without the contacts welding shut. That's a practical advantage: if the panel sits next to a furnace line or in a non-air-conditioned electrical room, the breaker still carries its full 400 A without nuisance tripping.
Fit and panel integration — 138 mm wide, 3-pole
At 138 mm wide, 248 mm tall, and 110 mm deep, this 3-pole MCCB fits standard Siemens SENTRON mounting bases and busbar systems. The basic switch variant is 3VA2440-6HN32-0AA0 — the -0JC0 suffix adds the shunt trip and aux switches pre-installed. No field retrofit required.