The 3VA1112-5EF32-0AA0-ZD00 is a 3-pole IEC frame 160 circuit breaker from Siemens' 3VA1 line, rated for line protection with a TM240 thermal-magnetic trip unit. Overload protection is adjustable: Ir from 88 A to 125 A, so you set the continuous current limit to match the downstream load — a 125 A feeder, for example, or a 100 A motor circuit. Short-circuit pickup Ii is fixed at 5 to 10 times In (625 A to 1250 A at the 125 A setting), which keeps the breaker selective with downstream devices on a typical radial feed.
Integration notes
The TM240 trip unit is non-interchangeable on this variant; verify the Ir setting before installation. The nut keeper kit retains the terminal screws under vibration, a detail worth checking if the panel ships to a site with known harmonic or switching transients.