Interrupting capacity is the headline: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. Communication function is onboard — relevant if you're feeding status into a BMS or PLC-based monitoring system.
That 105 mm width is standard for a 3-pole 160 A frame in the SENTRON 3VA family — it occupies the same DIN-rail or mounting-plate footprint as other 3VA breakers in this amp class, so a panel laid out for a 3VA2116 variant will accept this unit without re-drilling. Maximum power loss is 25.5 W. In a sealed or tightly packed enclosure, that heat has to be factored into the thermal budget — not a concern in ventilated gear, but worth noting for a high-density MCC lineup. The 70 °C operating ceiling matches the flat current rating — you don't lose ampacity at the top end.