What this 3VA1 breaker delivers
The Siemens 3VA1116-3EF32-0AA0-ZD00 is a 3-pole IEC frame 160 circuit breaker rated for line protection with a TM240 thermal-magnetic trip unit. Its 25 kA breaking capacity at 415 V (class N) means it can safely interrupt fault currents up to that level on a 400 V distribution bus — no cascading upstream breakers needed for most commercial and light-industrial panels. Overload protection is adjustable: Ir from 112 A to 160 A, so you set it to match the continuous load without swapping the trip unit. Short-circuit pickup Ii is fixed at 5 to 10 times In (800–1600 A), which is the standard range for motor and feeder protection in IEC 60947-2 applications. The -ZD00 suffix adds a nut keeper kit and is configured for a DC Power OEM in China — verify the accessory kit matches your panel's gland-plate or bus-bar mounting before specifying.
Where it fits in the panel
Mounts on DIN rail or direct panel-mount via the 3VA1 frame's snap-on foot — standard for IEC distribution boards. The 3-pole, 160 A frame occupies three modular units (each 27 mm wide on a DIN rail). The TM240 trip unit is non-interchangeable in the field; if your load profile changes beyond the Ir adjustment range, you replace the entire breaker, not just the trip block.