That TM210 designation means the thermal fixed at 40 A and the magnetic pickup is adjustable — you set the instantaneous trip threshold to match your load's inrush, not the other way around. Interrupting capacity hits 75.6 kA at 240 V and 52.5 kA at 415 V, so it clears high fault currents without cascading upstream on a 400 V distribution board. That UVR means the breaker drops out if control voltage falls below the dropout threshold — standard for emergency-stop chains or mains-loss protection on a machine feeder. The 2 HQ aux switches give you one N/O and one N/C contact for the PLC input and the panel lamp, no extra wiring for a third.
Derating and ambient — the numbers that matter for a closed panel
Above that it starts to taper: 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, and 36 A at 70 °C. The breaker itself is rated for operation down to -25 °C and stores down to -40 °C, so cold-start in an unheated plant room is fine. Dimensions are 70 mm deep, 76.2 mm wide, 130 mm tall — standard 3-pole MCCB footprint for a 40 A frame. Mount it inside a panel with a gasketed door if the environment is wet.