That 125 A holds flat through 50 °C — only starts to derate at 55 °C (122 A) and reaches 114 A at 70 °C, so in a warm enclosure you still get most of the rating. Breaking capacity is where this breaker earns its keep in high-fault installations: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and still 11.9 kA at 690 V. That covers most industrial distribution panels fed by transformers in the 1–2 MVA range.
Dimensions: 130 mm height, 101.6 mm width, 70 mm depth.
What the TM210 release means for selectivity
The TM210 is a fixed thermal-magnetic release — thermal element for overload, magnetic for short-circuit. No adjustable trip settings, no communication module (this variant has no communication function). That keeps it simple and reliable for line protection where you don't need remote monitoring or adjustable curves.