Siemens 3VA1050-3ED32-0HC0 — SENTRON MCCB, 50 A Line Protection
Breaking capacity is rated per voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V. That 52.5 kA at 415 V gives solid SCCR headroom for most 400 V distribution panels — you can coordinate downstream without worrying about the main breaker clearing first. The 7.5 kA at 690 V is lower, so if you're on a 690 V system verify the available fault current doesn't exceed that.
Panel Fit and Auxiliary Hardware
Footprint is 130 mm high, 76.2 mm wide, 70 mm deep — standard 3-pole MCCB size for a 50 A frame. The front carries IP40 protection, fine for a closed panel. It ships with a shunt trip (STL) release built in, order code 3VA9688-0BL30 for the integrated auxiliary trip, and two auxiliary switches HQ (2 HQ) for status feedback to the PLC or annunciator. No undervoltage release, no communication module, no ground-fault monitoring on this variant — it's a straight line-protection breaker. The voltage trigger is present, so you can remote trip via the shunt coil. Latching endurance is 15,000 operations, which is typical for an MCCB in a distribution role; not a switching-duty device.