The 50 A rated continuous current (Iu) holds across ambient temperatures from 40 °C through 50 °C, then derates to 48 A at 55 °C, 47 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C — so if the panel ambient runs above 50 °C, the continuous load must be backed off accordingly, not left at 50 A. The interrupting ratings are the real selector: 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. These numbers govern whether the breaker holds under a bolted fault at the available fault current on that bus. The TM210 trip unit is a fixed thermal-magnetic design — no interchangeable electronic trip module, no ground-fault or communication function. For a BOM freeze, the key fit check is whether the 50 A continuous rating and the interrupting capacity at your system voltage match the load and the available fault current on the distribution board.
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — the width is a standard 3-pole MCCB footprint for the 3VA frame size.