What this 50 A MCCB does on the line
The Siemens 3VA1050-2ED36-0DC0 is a 3-pole SENTRON molded case circuit breaker rated for 50 A continuous current at 40 °C, with a TM210 thermal-magnetic release that handles overload and short-circuit protection in a single unit. It carries 52.5 kA interrupting capacity at 240 V and 32 kA at 415 V, so it clears high-fault bolted shorts without the breaker welding shut — critical for panel SCCR coordination downstream of a transformer or large motor branch.
Above that, it derates linearly: 48 A at 55 °C, 47 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. If the panel ambient hits 60 °C, plan for a 47 A continuous load max — the breaker won't nuisance-trip on a 50 A load at that temp, but the TM element will track the thermal curve.
Interrupting ratings across voltages
Interrupting capacity drops as voltage rises: 52.5 kA at 240 V, 32 kA at 415 V, 13.6 kA at 440 V, and 7.5 kA at 690 V. At 690 V, keep the available fault below 7.5 kA or step up to a higher-interrupt frame.
Comes with two HQ (high-qualified) auxiliary switches and an undervoltage release (UVR) built in.