The Siemens SENTRON 3VA1116-5EF32-0CA0 is a 3-pole molded case circuit breaker rated for line protection, with a continuous current of 160 A at 40 °C, derating to 150 A at 70 °C. The 187 kA breaking capacity at 240 V tells you it can clear a fault on a high-capacity transformer secondary without the breaker itself failing; at 415 V that figure is 121 kA, and at 690 V it still holds 17 kA. That's a common requirement for motor feeder circuits where you want the breaker to drop out on loss of control power.
Panel fit and mounting — what the dimensions mean for your enclosure
The 3VA1116-5EF32-0CA0 measures 70 mm deep, 76.2 mm wide, and 130 mm high. The 70 mm depth leaves room behind the panel door for wiring gutters; watch the bend radius on 160 A cable lugs if your enclosure is shallow.