Kit is complete: the breaker, UVR, and comms interface are all in the carton.
Above that, the frame derates linearly: 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C. The 70 °C ceiling matches the maximum operating temperature spec, so the breaker itself is fine; the load current is what drops.
Breaking capacity by voltage level
This MCCB delivers 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 7.5 kA at 690 V. For 690 V applications, the 7.5 kA figure limits it to low-fault installations or requires upstream current-limiting fuses.
Verify the enclosure depth against the 110 mm plus wire-bending space — standard 200 mm deep enclosures work, shallow troughs may not.