Breaking capacity and thermal derating
This breaker's interrupting rating changes sharply with system voltage — 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. That 17 kA floor at 690 V is the number to check if you're feeding a 690 V motor control center; the high-side fault current available at the panelboard has to be below that. The TM210 release holds full 63 A rated current up through 50 °C ambient. At 55 °C it derates to 62 A, then 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. If your panel sits near a hot process line or a bank of drives, plan for that 5 A drop at the top end of the temperature range.
Four-pole width at roughly 4 inches means it takes the same panel space as a standard IEC 4-pole MCCB — no surprises on the DIN rail or mounting plate.