It's designed for line protection (feeders, distribution panels), not motor or generator protection. The 220 kA breaking capacity at 240 V is the headline number, but the real-world value is the 154 kA at 415 V and 121 kA at 440 V — that's the range where most industrial 3-phase distribution sits, and it gives you serious fault-current headroom without stepping up to a larger frame.
This breaker's interrupting rating drops off steeply above 500 V: 17 kA at 500 V and the same 17 kA at 690 V. That's not a typo — the TM220 release's arc extinction is optimized for the 240–440 V band. The temperature derating is minimal up to 50 °C (still 25 A), then drops to 24 A at 55–60 °C and 23 A at 65–70 °C — so in a warm enclosure you lose about 8% capacity, not the 15–20% some frames show.
That's a 4-inch wide footprint — standard for a 4-pole MCCB in this class. The IP40 front protection means it's fine in a closed panel; no washdown rating. You add those externally if needed.