What this 50 A MCCB covers
The Siemens SENTRON 3VA1050-2ED42-0KH0 is a 4-pole molded case circuit breaker rated for a continuous current of 50 A at ambient temperatures up to 50 °C, with only a 2 A derating step at 55 °C and a gradual decline to 45 A at 70 °C — meaning it holds its full rating across most panel environments without forced derating. The TM210 thermal-magnetic release handles overload and short-circuit protection for line protection duty, with breaking capacities of 52.5 kA at 240 V and 32 kA at 415 V — enough for most industrial distribution boards.
The 3VA1050-2ED42-0KH0 measures 101.6 mm wide by 130 mm tall by 70 mm deep — a standard 4-pole MCCB footprint that drops into a SENTRON panelboard or a DIN-rail adapter without re-drilling the gland plate. Front face is IP40 rated, so it's protected against tools and solid objects larger than 1 mm; the interior remains open to the panel environment, so keep the enclosure clean.