The Siemens 3VM1150-3ED16-0AA2 is a 1-pole IEC circuit breaker from the 3VM1 frame-160 series, rated at In=50A with a fixed thermal-magnetic trip (TM210, FTFM) and a breaking capacity Icu=25kA at 240V AC. The overload protection Ir is fixed at 50A, and the short-circuit protection Ii is set at 10 x In (500A), non-adjustable. This is a line-protection device for distribution panels where the fault current stays within the class N envelope.
What the ratings mean for fit
The 25kA Icu at 240V defines the maximum fault current the breaker can safely interrupt without welding or rupturing — class N is the standard breaking capacity for most commercial and light industrial distribution boards. The fixed 50A Ir means this breaker is sized for a specific load circuit; no field adjustment of the thermal pickup is possible. The Ii of 10 x In (500A) provides magnetic trip for short circuits, and since it is non-adjustable, selectivity with downstream devices depends on the upstream breaker's instantaneous threshold being higher. Terminal connection suits standard panel wiring; the 3VM1 frame accepts busbar or cable terminations up to the rated cross-section.