50 A MCCB with TM210 release — what the ratings mean for your panel
The Siemens 3VA1050-3ED36-0AA0 is a SENTRON 3-pole molded case circuit breaker rated for 50 A uninterrupted current (Iu) at 40 °C, with a TM210 thermal-magnetic overcurrent release. Breaking capacity is listed per voltage: 75.6 kA at 240 V AC, 52.5 kA at 415 V AC, 32 kA at 440 V AC, and 7.5 kA at both 500 V and 690 V AC. The 75.6 kA figure at 240 V covers high-fault panels on the North American 120/240 V split-phase grid. The 52.5 kA at 415 V handles most European industrial distribution. The 7.5 kA at 690 V is the ceiling for this frame — if your fault current at 690 V exceeds that, you need a larger 3VA frame or a current-limiting upstream device.
Panel fit — dimensions and integration
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a compact 3-pole footprint that fits standard 3VA1 panel cutouts and busbar systems. Front IP40 protection means it is suited for enclosed distribution boards; not rated for washdown or outdoor exposure. The 14.6 W maximum power loss at rated current should be factored into enclosure thermal calculations — in a sealed cabinet with multiple breakers, that heat adds up.