What this MCCB is and what the ratings mean for fit
The Siemens SENTRON 3VA1116-5EF36-0HA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection — the core job of clearing overloads and short circuits in a distribution panel before they damage downstream wiring or loads. Its continuous current rating Iu is 160 A, and it holds that rating from 40 °C through 50 °C ambient; above that it derates to 153.6 A at 55 °C, 150.4 A at 60 °C, 147.2 A at 65 °C, and 144 A at 70 °C. That means in a warm enclosure — say a non-air-conditioned switchroom hitting 55 °C — you lose about 4 % of the headroom, not a full de-rate step. The interrupting capacity is the headline: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V. For a 480 V panel the 75.6 kA figure is the one that governs SCCR coordination; it comfortably clears most industrial fault levels without needing a current-limiting upstream fuse.
Dimensions and panel fit
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep. The 76.2 mm width is a standard 3-pole MCCB footprint for this class — it occupies three 25.4 mm (1-inch) module positions on a DIN rail or panel-mount backplate. Depth of 70 mm means it clears most standard enclosure depths without forcing a deeper can. The reference code per DIN EN 81346-2 is Q, which designates it as a switching device in the functional naming convention.