Siemens 3VA1050-3ED36-0JA0 — 50 A SENTRON MCCB with Shunt Trip
It carries a 75.6 kA interrupting capacity at 240 V and 52.5 kA at 415 V, with a rated insulation voltage of 800 V.
Breaking Capacity and Thermal Ratings
The 75.6 kA at 240 V and 52.5 kA at 415 V mean this MCCB can safely interrupt high fault currents on 240 V and 415 V three-phase systems — typical for industrial panel feeders and large motor branch circuits. The thermal derating curve is flat from 40 °C to 50 °C (50 A), then steps down to 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C.
Physical Integration and Panel Fit
The 3-pole footprint is standard for 50 A frames; verify gland-plate clearance for the 70 mm depth, especially in shallow enclosures. The shunt trip occupies the auxiliary slot and requires a separate control voltage — confirm polarity and suppression per the wiring diagram.
Power Loss and Operating Range
Maximum power loss is 14.6 W at rated current — relevant for thermal budgeting inside sealed enclosures.