Its TM240 thermal-magnetic release handles overload and short-circuit conditions without external control wiring — a straightforward drop-in for a 40 A feeder or subfeed application.
At 415 V the interrupting rating is 52.5 kA, dropping to 32 kA at 440 V and 11.9 kA at 500 V or 690 V. That 52.5 kA at 415 V gives you solid headroom for most commercial and light industrial panels where the prospective fault current sits in the 25–35 kA range.
Rated current holds at 40 A up to 50 °C ambient, then derates to 39 A at 55–60 °C and 38 A at 65 °C, reaching 37 A at 70 °C.
Auxiliary switching and trip indication
The trip indicator on the front gives local visual confirmation.
The SENTRON 3VA family is Siemens' standard MCCB line, so replacement availability through distribution is steady.