What the ratings mean for your panel
The Siemens 3VA1116-6EF32-0AH0 is a 3-pole IEC frame 160 molded-case circuit breaker with a breaking capacity class H — Icu of 70 kA at 415 V AC. That 70 kA rating means it can safely interrupt a fault current up to that level without welding contacts or cascading failure upstream, which is the figure you need for the SCCR declaration on a 400 V distribution panel. The TM240 thermal-magnetic trip unit gives you an adjustable overload protection band (Ir) from 112 A to 160 A, and the short-circuit magnetic trip (Ii) is fixed at 5 to 10 times In — so at the 160 A rating, the magnetic pickup sits between 800 A and 1600 A. That range is wide enough to ride through motor inrush on a 160 A feeder but still trip fast on a hard bolted fault. The part ships with a nut keeper kit, two auxiliary switches (HQ), and one trip alarm switch (HQ) pre-installed — those are the signaling contacts you'd wire back to a PLC or annunciator panel to indicate breaker position and fault status. No separate accessory ordering needed for basic status feedback.
Integration notes for the panel builder
Mounts on a standard DIN rail or can be screw-fixed to a backplate — the 3VA1 frame footprint is shared across the 160 A family, so cutouts and busbar positions are consistent if you swap ratings later. The TM240 thermal unit is ambient-compensated, but if the panel runs above 40 °C, derate the Ir setting per the thermal curve in the manual; the magnetic trip is less temperature-sensitive. The auxiliary and alarm switches are wired via plug-in terminals on the breaker face — no need to open the arc chamber. Verify the switch wiring polarity if you are feeding a DC control circuit; the HQ contacts are rated for both AC and DC, but DC breaking capacity drops at higher voltages, so check the switching capacity table for your control voltage.