The Siemens 3VA1463-6GE42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 630 A continuous current across a 4-pole configuration. That 630 A holds flat from 40 °C up to 50 °C, then derates to 583 A at 70 °C — so in a warm panel you still have headroom before you hit the trip curve. The interrupting capacity is where this part earns its keep: 220 kA at 240 V, 154 kA at 415/440 V, 121 kA at 500 V, and 17 kA at 690 V. That 220 kA at 240 V means it can clear a fault on a high-capacity transformer secondary without the upstream breaker needing to coordinate — it's a high-interrupting device, not a branch-rated unit.
Overcurrent release and protection design
It carries a TM220 thermal-magnetic overcurrent release — the thermal element handles overloads, the magnetic element handles short-circuits. The design is line protection, meaning it's intended for feeder circuits, not motor branch protection (no motor-overload relay built in). Rated insulation voltage is 800 V, so it's comfortable on 480/277 V or 600 V systems with margin. Max power loss at rated current is 192.9 W — account for that heat in the enclosure sizing, especially if you're packing several breakers side by side.
Physical fit and environment
Dimensions: 248 mm high, 184 mm wide, 110 mm deep. That 184 mm width on a 4-pole breaker is standard for the frame size — it'll fit a 200 mm wide DIN-rail enclosure with a few mm to spare on each side. Front protection is IP40, so it's fine in a clean indoor panel; not rated for washdown. Operating temperature range is -25 °C to 70 °C; storage from -40 °C to 80 °C. No undervoltage release fitted, no communication module, no ground-fault monitoring — it's a straight thermal-magnetic breaker, no accessories pre-installed.