It delivers a breaking capacity of 121 kA at 240 V AC, 75.6 kA at 415 V, and 52.5 kA at 440 V, with a rated insulation voltage of 800 V and a maximum operating voltage of 690 V AC. The 40 A rating holds across ambient temperatures from 40 °C to 50 °C, then derates to 39 A at 55–60 °C and 37 A at 70 °C — useful for a warm enclosure without oversizing the frame. Front IP40 protection suits panel-mount installation behind a closed door; the 70 mm depth and 76.2 mm width fit standard Siemens 3VA panel cutouts and busbar systems.
At 240 V AC the 121 kA interrupting rating handles high-fault utility feeds common in North American distribution. At 415 V the 75.6 kA covers most European industrial transformer secondaries. The rating drops to 11.9 kA at 500 V and 690 V — still adequate for motor branch circuits on 480 V or 600 V class systems where fault current typically stays under 10 kA.
The TM210 release is fixed thermal-magnetic — no interchangeable trip units, so verify the 40 A rating matches your load before installation. Optional motor drive accessory is supported for remote switching. Maximum power loss of 10.8 W at rated current is moderate; no forced cooling needed in a ventilated enclosure, but account for it in a sealed cabinet thermal calculation.