Panel fit and protection profile
The Siemens SENTRON 3VA1050-4ED42-0DH0 is a 4-pole molded case circuit breaker (MCCB) sized for line protection in distribution panels, with a continuous current rating of 50 A at 40 °C — the same rating holds through 50 °C, then derates gradually to 45 A at 70 °C. Breaking capacity is 121 kA at 240 V AC, dropping to 75.6 kA at 415 V and 52.5 kA at 440 V — still well into the high-fault range for most industrial service entrances or sub-distribution boards.
Dimensions are 130 mm high, 101.6 mm wide, 70 mm deep — a standard SENTRON 3VA frame size that bolts into a panel or mounts on a mounting plate; the 4-pole width is wider than a 3-pole unit, so verify the backpanel layout if replacing a three-pole breaker.