What this 500 A MCCB actually delivers
The Siemens 3VA1450-5GE42-0AA0 is a SENTRON molded case circuit breaker rated for 500 A continuous at 40 °C — that's a straight 500 A, no derating needed until you push past 55 °C ambient. The interrupting capacity tells you where this breaker lives: 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 11.9 kA at 690 V. That's a high-fault-rated unit — it handles industrial service-entrance or large feeder duty where fault currents run hot. The TM220 overcurrent release is a thermal-magnetic design — thermal element handles overloads, magnetic coil handles short-circuits. It's a straight line-protection breaker for feeders and large branch circuits where you don't need adjustable trip curves or remote monitoring.
Dimensions are 248 mm tall, 184 mm wide, 110 mm deep — a 4-pole frame at this current class. If you need those, you're looking at a different order code within the 3VA family. The breaker itself is the base line-protection block.