Three poles, rated 160 A continuously at ambient temperatures up to 50 °C — above that it derates linearly to 142 A at 70 °C, so if your panel runs hot, that's the number to size against, not the 160 A label. Breaking capacity is 187 kA at 240 V AC, dropping to 121 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V. That covers most industrial service-entrance and feeder applications where fault current runs high at lower voltages. The UVR means the breaker trips on loss of control voltage — common in safety circuits where a downstream E-stop or safety relay drops the coil to kill power.
Power loss at full rated current is 35.5 W — negligible for a single breaker, but if you're packing a dozen of these in a panel, that heat adds up.