It carries a 40 A continuous rating at 40 °C, and the thermal-magnetic TM240 release means the thermal element handles overloads and the magnetic element handles short-circuits — no electronic adjustment, just reliable bimetal and solenoid action. Breaking capacity is the headline: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and still 17 kA at 690 V.
The 40 A rating holds from 40 °C through 50 °C. At 55 °C it drops to 39 A, at 65 °C to 38 A, and at 70 °C to 37 A. That matters when sizing for a continuous load near the limit.
Three-pole, 70 mm deep, 76.2 mm wide, 130 mm tall. The width is a standard 3-inch (76.2 mm) footprint — drops into a 3-pole MCCB slot on a DIN rail or panel-mount base without adapters. This is a plain-vanilla thermal-magnetic breaker — no electronics to fail, but also no remote trip or GFCI capability.