The Siemens SENTRON 3VA1050-3ED36-0DC0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection, carrying a continuous current rating of 50 A at 40 °C and holding that same rating through 50 °C before derating to 49 A at 55 °C and 45 A at 70 °C. Breaking capacity runs 75.6 kA at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V, dropping to 7.5 kA at 500 V and 690 V.
If your panel runs hotter — say, 65 °C — the same breaker is good for 46 A. The 75.6 kA interrupting rating at 240 V is what the breaker can safely clear under a fault; at 415 V that drops to 52.5 kA, and at 690 V to 7.5 kA.
Deployment context
The undervoltage release (UVR) is factory-fitted, so no field assembly needed.