The Siemens 3VA1040-3ED42-0AA0-ZD00 is a 4-pole IEC frame 100 circuit breaker from the 3VA1 series, with a breaking capacity class N giving it an Icu of 25 kA at 415 V. It's set up for line protection with a TM210 thermal-magnetic trip unit, fixed at 40 A overload (Ir=40 A) and a short-circuit pickup of 10 times In (Ii=10 x In). The neutral conductor is unprotected, and it includes a nut keeper kit — this variant is configured for DC Power OEM use in China.
For a 40 A feeder on a 415 V three-phase system, that's plenty of headroom for most industrial distribution boards. The TM210 thermal-magnetic trip gives you a fixed overload curve (thermal) and a fixed magnetic short-circuit pickup at 400 A (10 x 40 A). No adjustment dials, so it's a set-and-forget part for a known load.