It carries a continuous current rating of 25 A at 40 °C, derating slightly to 23 A at 70 °C, so on a warm panel you still have headroom for a 20 A load without nuisance tripping. The TM240 thermal-magnetic release handles overloads and short-circuits; the integrated undervoltage release (UVR) drops the breaker if control voltage falls, which is useful for emergency-stop circuits or mains-failure protection.
The interrupting rating is 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 500 V and 690 V. At 240 V that 187 kA figure is high — it will clear a fault on a large transformer secondary without the arc re-striking. At 690 V the 17 kA still covers most industrial motor circuits.