Motor protection circuit breaker for 40 A loads
It's sized for a 18.5 kW motor at 400 V AC, making it a common choice for medium-horsepower pump, fan, and conveyor drives in control panels.
The 40 A continuous rating and 18.5 kW at 400 V set the upper bound for motor size this breaker protects. The Class 10 trip means it will clear a locked-rotor condition within 10 seconds at 7.2× rated current, which is standard for standard induction motors — no need for a slower Class 20 unless you're starting high-inertia loads.
Dimensions are 55 mm wide, 140 mm high, 149 mm deep — figure that into your DIN rail layout and enclosure depth. The screw terminals accept 2x (0.75–16 mm²) solid or 2x (0.75–25 mm²) stranded, with a single terminal taking up to 35 mm² stranded. That's enough for the incoming feeder and motor leads.
The substance prohibitance date of 07/01/2006 aligns with RoHS compliance (RoHS took effect July 2006). Shock resistance is 25g for 11 ms, so it holds up in moderate vibration environments.