The Siemens 3VA1050-3ED36-0HH0 is a SENTRON-series 3-pole molded case circuit breaker rated 50 A continuous at 40 °C, with a 75.6 kA interrupting capacity at 240 V. The interrupting curve drops to 52.5 kA at 415 V, 32 kA at 440 V, and holds 7.5 kA at 500 V and 690 V, so the SCCR coordination study needs to match the actual fault current at the point of installation. Thermal derating is minimal through 50 °C — still 50 A — then drops to 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. That's a clean thermal curve for a panel running warm; you don't lose headroom until the ambient pushes past 50 °C.
Auxiliary and release options onboard
That means you get remote status indication — open/closed from the aux contacts, plus a dedicated alarm contact that changes state only on a trip event — and a remote trip capability via the shunt release. No undervoltage release is fitted, and no ground-fault monitoring module is included. Communication function is not built in — this is a plain breaker, not a metering or communication variant.