What this MCCB delivers for the panel
The Siemens 3VA1150-6GD46-0AA0 is a 4-pole SENTRON molded case circuit breaker rated for 50 A continuous at 40 °C through 50 °C, with a TM210 thermal-magnetic release — fixed thermal, fixed magnetic, no trip indicator, no undervoltage release, and no communication function. It is a line-protection device (not motor-protection or ground-fault), designed for straightforward feeder and distribution duty in a 70 mm deep × 101.6 mm wide × 130 mm high footprint that clips onto a DIN rail or mounts via the rear panel cutout. The 50 A rating holds flat across the 40 °C to 50 °C band, then derates to 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C — a gentle slope that keeps the breaker usable in a warm enclosure without oversizing. Breaking capacity is where this part earns its place: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at both 500 V and 690 V. That 220 kA figure at 240 V means it can interrupt a fault on a high-capacity transformer secondary without the arc flash climbing upstream — a real advantage in a data-center or industrial distribution panel where available fault current is high.
DIN-rail fit and panel integration
At 70 mm deep and 101.6 mm (4 in) wide, the 3VA1150-6GD46-0AA0 fits a standard 4-pole MCCB slot on a DIN rail or through a panel cutout. The IP40 front protection means it is suited for a dry indoor enclosure — no washdown rating, so keep it behind a sealed gland plate if the panel sees condensation or spray. Power loss is 14.6 W maximum — modest enough that adjacent breakers in a multi-unit lineup do not need extra ventilation at 50 A, but worth checking on a densely packed rail at the 70 °C end of the operating range.