The Siemens 3VA1140-3ED36-0AA0 is a SENTRON molded case circuit breaker for line protection, rated 40 A continuous at 40 °C and holding that full rating through 50 °C — no derate needed in a warm enclosure until you cross 55 °C, where it steps down 1 A per 5 °C increment to 37 A at 70 °C. Breaking capacity hits 75.6 kA at 240 V, 52.5 kA at 415 V, and still holds 11.9 kA at 690 V — that high 240 V figure tells you this is built for the North American 277/480 V split-phase panel market as much as the European 400 V distribution board.
Footprint is 130 mm high, 76.2 mm wide, 70 mm deep — standard 3-pole MCCB envelope for DIN-rail or panel-mount backplate assembly; the IP40 front face keeps dust out of the enclosure but expects a sealed cabinet if washdown is in play.
Rated insulation voltage 800 V, operating range -25 °C to 70 °C, storage from -40 °C to 80 °C — covers most industrial panel environments without special handling.