What this MCCB is and what the ratings mean for your panel
The Siemens SENTRON 3VA1116-5EF32-0BA0 is a 3-pole molded case circuit breaker (MCCB) rated for a continuous current Iu of 160 A, with a TM240 thermal-magnetic overcurrent release. That 160 A holds across the 40 °C to 50 °C band without derating — at 55 °C it's still 153.6 A, and at 70 °C it's 144 A, so you've got headroom in a warm enclosure as long as you stay within the -25 °C to 70 °C operating range. The breaking capacity is what makes this part stand out for high-fault panels: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V. Those numbers mean it can safely interrupt a fault current up to that level without failing catastrophically — critical for coordination studies where the utility transformer can deliver a massive short-circuit current. The rated insulation voltage Ui is 800 V, so it's comfortable on 480 V and 600 V class systems. This is the line protection version (not motor protection), so it's sized for feeder circuits, busbars, or distribution panels where you need to protect cable and bus against overload and short circuit. It ships with an undervoltage release (UVR) built in — design of the auxiliary release is undervoltage release (UVR) — and the integrated auxiliary trip is order code 3VA9608-0BB11 if you need that spare. No auxiliary contacts, no ground fault monitoring, no communication module on this variant.
Panel integration and physical fit
The MCCB measures 76.2 mm wide, 130 mm tall, and 70 mm deep. That 76.2 mm width is a standard 3-pole MCCB footprint — three 25.4 mm pole spacings — so it fits the usual DIN-rail or panel-mount cutout without surprises. The front face carries an IP40 protection class, meaning it's protected against tools and wires larger than 1 mm, but it's not sealed against water ingress; keep it inside the enclosure, not on a washdown wall.