Siemens 3VA1050-3ED42-0JC0 — 50 A 4-Pole MCCB with Shunt Trip
The Siemens 3VA1050-3ED42-0JC0 is a 4-pole SENTRON molded case circuit breaker (MCCB) designed for line protection, rated at 50 A continuous current across a 40 °C to 50 °C ambient range before derating begins. It carries a 75.6 kA interrupting capacity at 240 V, stepping down to 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at both 500 V and 690 V — the voltage-dependent break curve you need to check against your available fault current at the panelboard.
Above that, it derates linearly: 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C.
The 4-pole width (101.6 mm) is standard for a 4-pole MCCB in this frame size — verify your DIN-rail or mounting-plate spacing allows the full pole count plus wiring bend radius.