That 320 A holds flat through 50 °C — only starts derating at 55 °C (313 A) down to 292 A at 70 °C, so it handles warm enclosures without a frame size jump. The TM220 overcurrent release combines a thermal fixed-trip element for overloads with a magnetic short-circuit trip, no electronic adjustments to fail or mis-set. Breaking capacity is 121 kA at 415 V and 440 V, dropping to 75.6 kA at 500 V and 11.9 kA at 690 V. At 240 V it reaches 187 kA.
If your spec calls for shunt trip or aux contacts, you need the -5EE32-0AA0 suffix variant with those options.