The Siemens 3VA2140-5MN32-0JC0 is a 3-pole SENTRON molded case circuit breaker rated for 40 A continuous current at 40 °C, purpose-built for motor protection with the ETU350M electronic trip unit. That 40 A holds flat through 50 °C — only above 55 °C does it begin to derate, reaching 36 A at 70 °C, so in a warm panel you still get nearly full rating. The ETU350M includes phase failure detection, which is the main reason you reach for a motor-protection MCCB over a standard thermal-magnetic: it catches a lost phase before the motor overheats. Breaking capacity is the other headline: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V.
Two HQ auxiliary switches are built in, so you get status feedback without an add-on module.