What the ratings mean for your panel
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. Its headline rating is Icu=55kA at 415 V — breaking capacity class M — meaning it can safely interrupt a fault current up to 55 kA without welding or rupturing. That puts it in the middle of the 3VA1 breaking capacity range, suited for industrial distribution panels where the available fault current sits in that band. 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
Mounts on a standard DIN rail in the enclosure — the 3VA1 frame accepts plug-in or fixed terminals. 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.