Siemens SENTRON 3VA1140-3EF36-0AA0 — 40 A MCCB, Line Protection, Active Production
It's rated 40 A at 40 °C (holds that same 40 A all the way up to 50 °C, then derates to 37 A at 70 °C), so you don't lose headroom on a warm panel floor. The TM240 thermal-magnetic release handles overloads and short-circuits without a separate trip unit. Breaking capacity hits 75.6 kA at 240 V, 52.5 kA at 415 V, and still 11.9 kA at 690 V — that's serious fault-interruption muscle for a 40 A frame. Front protection is IP40, fine for a closed panel; don't hose it down on the line.
Dimensions & Panel Fit
The 3VA1140-3EF36-0AA0 measures 70 mm deep, 76.2 mm wide, and 130 mm tall. Width at 76.2 mm (3 inches) is standard for a 3-pole MCCB in this frame size — drops into the same DIN-rail or panel-mount footprint as other 3VA breakers.