The Siemens 3VM1150-5EE36-0AA2 is a 3-pole IEC frame 160 molded-case circuit breaker with a 55 kA interrupting capacity at 415 V (class M). That rating means it can clear a fault up to 55,000 amps without welding the contacts or rupturing the case — critical for high-fault panels where upstream breakers need to stay selective. It ships with a TM220 thermal-magnetic trip unit, adjustable overload protection from 35 A to 50 A, and a fixed short-circuit pickup at 10 times the rated current (Ii = 10 x In). Terminal connections are standard for panel-mount bus or cable.
What the ratings mean on your panel
The 55 kA Icu at 415 V is the maximum short-circuit current the breaker can safely interrupt once. In a real panel, you coordinate this with the upstream transformer impedance and downstream load — if your available fault current is 30 kA, this breaker gives you a solid margin. The adjustable Ir (35 A to 50 A) lets you dial in the thermal trip to match the full-load amps of a motor or a feeder without swapping the trip unit. Fixed Ii at 10 x In means the magnetic trip fires at 500 A for the 50 A setting — good for motor inrush on a pump or conveyor, but check your starting current if you have a high-inertia load that draws over 500 A for more than a few cycles.