The Siemens 3VA1110-5EF32-0AA0-ZD00 is a 3-pole IEC frame 160 circuit breaker with a 55 kA ultimate breaking capacity (Icu) at 415 VAC, placing it in breaking capacity class M. The thermal-magnetic trip unit (TM240, ATAM) is set for a rated current In of 100 A, with adjustable overload protection Ir from 70 A to 100 A and short-circuit protection Ii adjustable from 5 to 10 times In. This variant includes a nut keeper kit and is designated for a DC Power OEM in China.
What the Ratings Mean for Fit
The 55 kA Icu at 415 V defines the maximum fault current the breaker can safely interrupt without damage under test conditions — critical for verifying SCCR compliance in a panel where the available fault current approaches that level. The adjustable overload (Ir 70–100 A) and short-circuit (Ii 5–10 x In) bands let you coordinate with downstream branch protection without swapping trip units. The 3-pole, 100 A frame suits line-side protection for distribution panels, large motor control centers, or as a main disconnect on a 415 VAC supply.
Integration Notes
Mounts in a standard IEC frame 160 panel cutout or on a DIN rail adapter (not included). The nut keeper kit is factory-fitted for the DC Power OEM variant; verify terminal torque ratings per the installation instructions before terminating copper or aluminum conductors. The thermal-magnetic trip requires no external control power — it is self-powered from the line side.