The Siemens 3VM1150-3ED26-0AA2 is a 2-pole IEC frame 160 circuit breaker from the 3VM1 series, rated for line protection with a TM210 thermal-magnetic trip unit. Breaking capacity sits at 25 kA at 415 V (class N), which means it can safely interrupt fault currents up to that level on a 415 VAC supply — enough headroom for most industrial distribution panels without cascading upstream. Overload protection is fixed at Ir = 50 A (non-adjustable), and short-circuit protection trips at Ii = 10 x In (500 A). Terminal connections are standard for panel wiring.
What the ratings mean for fit
The 25 kA @ 415 V breaking capacity (class N per IEC 60947-2) is the key coordination figure — it tells you this breaker can clear a bolted fault up to that level without welding contacts or rupturing the case. For a 50 A feeder protecting a motor control center or a lighting panel, that's typical for secondary distribution; if your available fault current at the panel exceeds 25 kA, you need a higher-rated frame or a current-limiting upstream breaker. The TM210 trip curve gives a 10x magnetic pickup, so it rides through moderate inrush (like a group of contactors or a small transformer) but clears fast on a hard short.