What this breaker delivers
The Siemens 3VA1112-6EF32-0AA0-ZD00 is a 3-pole IEC frame 160 circuit breaker with a 70 kA breaking capacity at 415 V — class H, meaning it clears high-fault currents on a 415 V line without cascading upstream. Overload protection is set via the TM240 thermal-magnetic trip unit, adjustable from 88 A to 125 A (Ir). Short-circuit pickup (Ii) is fixed at 5 to 10 times In, so on the 125 A rating that translates to 625–1250 A instantaneous trip.
Mounts on DIN rail in a standard 3-pole IEC footprint. The TM240 trip unit is front-adjustable for Ir, so you can dial in the overload protection without pulling the breaker out of the panel. Terminals accept copper conductors sized for 125 A continuous; torque to the values marked on the terminal label. The nut keeper kit secures the breaker in the DC Power OEM assembly — verify the kit is present on delivery if the BOM calls for it.