What you're looking at
The thermal-magnetic TM-D trip gives you L (overload) protection via a bimetal element and I (short-circuit) protection via a solenoid — simple, field-adjustable, no electronics to fail. The 100 kA Icu at 240 V AC is the maximum fault current it can safely interrupt; at 415 V it still handles 70 kA, and even at 690 V it holds 10 kA. That's a serious SCCR for a 160 A frame. Electrical durability is listed at 40,000 cycles at 440 V at half rated current, and 20,000 cycles at full rated current. Mechanical durability matches at 40,000 cycles. For a distribution breaker that's solid — it's not a contactor meant for millions of operations, but it'll handle routine switching for years in a panel. Power dissipation runs 13.95 W per pole, so roughly 42 W total for the 3-pole unit.
The 105 mm width and 161 mm height fit standard ComPacT NSX panel cutouts. IK07 impact resistance handles incidental tool bumps during installation.