Rated 20 A continuous current (Iu) with a TM240 thermal-magnetic release, it holds full load at 20 A up to 50 °C ambient, then derates to 18 A at 70 °C — so in a hot panel or next to a drive, you need to check the actual ambient before you commit the BOM line. The interrupting ratings are the headline: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V — these tell you the breaker can safely clear a fault up to those levels without welding contacts or bursting the case, which means it handles high-fault-current industrial service without cascading upstream.
Three-pole, 70 mm deep, 76.2 mm wide, 130 mm tall — it mounts on a DIN rail or panel base in a standard distribution enclosure, with IP40 protection on the front face.
Latching endurance is 15,000 operations — mechanical life, not electrical load-switching life.